{"id":7049,"date":"2025-09-06T07:56:51","date_gmt":"2025-09-06T07:56:51","guid":{"rendered":"https:\/\/cntnmcb.com\/?page_id=7049"},"modified":"2026-01-10T08:27:23","modified_gmt":"2026-01-10T08:27:23","slug":"dc-molded-case-circuit-breaker","status":"publish","type":"page","link":"https:\/\/cntnmcb.com\/ru\/dc-molded-case-circuit-breaker\/","title":{"rendered":"\u0410\u0432\u0442\u043e\u043c\u0430\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0439 \u0432\u044b\u043a\u043b\u044e\u0447\u0430\u0442\u0435\u043b\u044c \u043f\u043e\u0441\u0442\u043e\u044f\u043d\u043d\u043e\u0433\u043e \u0442\u043e\u043a\u0430 \u0432 \u043b\u0438\u0442\u043e\u043c \u043a\u043e\u0440\u043f\u0443\u0441\u0435"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"7049\" class=\"elementor elementor-7049\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1880ba3 e-flex e-con-boxed e-con e-parent\" data-id=\"1880ba3\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2df7188 elementor-widget elementor-widget-heading\" data-id=\"2df7188\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">DC Molded Case Circuit Breaker<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d4b5ab9 elementor-icon-list--layout-traditional elementor-list-item-link-full_width elementor-widget elementor-widget-icon-list\" data-id=\"d4b5ab9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon-list.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<ul class=\"elementor-icon-list-items\">\n\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-check-square\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M400 480H48c-26.51 0-48-21.49-48-48V80c0-26.51 21.49-48 48-48h352c26.51 0 48 21.49 48 48v352c0 26.51-21.49 48-48 48zm-204.686-98.059l184-184c6.248-6.248 6.248-16.379 0-22.627l-22.627-22.627c-6.248-6.248-16.379-6.249-22.628 0L184 302.745l-70.059-70.059c-6.248-6.248-16.379-6.248-22.628 0l-22.627 22.627c-6.248 6.248-6.248 16.379 0 22.627l104 104c6.249 6.25 16.379 6.25 22.628.001z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">Over 10 years of experience in manufacturingDC Molded Case Circuit Breaker(DC MCCB)<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-rocket\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M505.12019,19.09375c-1.18945-5.53125-6.65819-11-12.207-12.1875C460.716,0,435.507,0,410.40747,0,307.17523,0,245.26909,55.20312,199.05238,128H94.83772c-16.34763.01562-35.55658,11.875-42.88664,26.48438L2.51562,253.29688A28.4,28.4,0,0,0,0,264a24.00867,24.00867,0,0,0,24.00582,24H127.81618l-22.47457,22.46875c-11.36521,11.36133-12.99607,32.25781,0,45.25L156.24582,406.625c11.15623,11.1875,32.15619,13.15625,45.27726,0l22.47457-22.46875V488a24.00867,24.00867,0,0,0,24.00581,24,28.55934,28.55934,0,0,0,10.707-2.51562l98.72834-49.39063c14.62888-7.29687,26.50776-26.5,26.50776-42.85937V312.79688c72.59753-46.3125,128.03493-108.40626,128.03493-211.09376C512.07526,76.5,512.07526,51.29688,505.12019,19.09375ZM384.04033,168A40,40,0,1,1,424.05,128,40.02322,40.02322,0,0,1,384.04033,168Z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">Rapid production and delivery capabilities<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-book-open\" viewBox=\"0 0 576 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M542.22 32.05c-54.8 3.11-163.72 14.43-230.96 55.59-4.64 2.84-7.27 7.89-7.27 13.17v363.87c0 11.55 12.63 18.85 23.28 13.49 69.18-34.82 169.23-44.32 218.7-46.92 16.89-.89 30.02-14.43 30.02-30.66V62.75c.01-17.71-15.35-31.74-33.77-30.7zM264.73 87.64C197.5 46.48 88.58 35.17 33.78 32.05 15.36 31.01 0 45.04 0 62.75V400.6c0 16.24 13.13 29.78 30.02 30.66 49.49 2.6 149.59 12.11 218.77 46.95 10.62 5.35 23.21-1.94 23.21-13.46V100.63c0-5.29-2.62-10.14-7.27-12.99z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">Provide product customization<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-dot-circle\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M256 8C119.033 8 8 119.033 8 256s111.033 248 248 248 248-111.033 248-248S392.967 8 256 8zm80 248c0 44.112-35.888 80-80 80s-80-35.888-80-80 35.888-80 80-80 80 35.888 80 80z\"><\/path><\/svg>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">24*7 online service for you<\/span>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t<\/ul>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ee94e78 elementor-widget__width-inherit elementor-align-left elementor-widget elementor-widget-button\" data-id=\"ee94e78\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"#elementor-action%3Aaction%3Dpopup%3Aopen%26settings%3DeyJpZCI6Ijc1ODAiLCJ0b2dnbGUiOmZhbHNlfQ%3D%3D\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t<span class=\"elementor-button-icon\">\n\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fab-telegram-plane\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M446.7 98.6l-67.6 318.8c-5.1 22.5-18.4 28.1-37.3 17.5l-103-75.9-49.7 47.8c-5.5 5.5-10.1 10.1-20.7 10.1l7.4-104.9 190.9-172.5c8.3-7.4-1.8-11.5-12.9-4.1L117.8 284 16.2 252.2c-22.1-6.9-22.5-22.1 4.6-32.7L418.2 66.4c18.4-6.9 34.5 4.1 28.5 32.2z\"><\/path><\/svg>\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Get a quote<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-b63365d e-flex e-con-boxed e-con e-parent\" data-id=\"b63365d\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-05fcc26 elementor-widget elementor-widget-heading\" data-id=\"05fcc26\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Our reliable products for you<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-16cb6a3 elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"16cb6a3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f576d82 elementor-widget elementor-widget-text-editor\" data-id=\"f576d82\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"auto-hide-last-sibling-br paragraph-JOTKXA paragraph-element br-paragraph-space\">The DC molded case circuit breakers (MCCBs) we manufacture are equipped with overload protection, short-circuit protection, and isolation functions, ensuring the stable operation and electrical safety of your DC power distribution system.<\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2940cc7 eael-product-grid-column-3 elementor-widget elementor-widget-eicon-woocommerce\" data-id=\"2940cc7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"eicon-woocommerce.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\n        <div class=\"eael-product-grid eael-product-simple grid\" id=\"eael-product-grid\" data-widget-id=\"2940cc7\" data-page-id=\"7049\" data-nonce=\"c09c8885ff\" >\n            <div class=\"woocommerce\">\n                <ul class=\"products eael-post-appender eael-post-appender-2940cc7\" data-ssi-desktop=\"no\" data-ssi-tablet=\"no\" data-ssi-mobile=\"no\" data-layout-mode=\"grid\"> <li class=\"product \">\n<div class=\"eael-product-wrap\" data-src=\"\" data-src-hover=\"\">\n    <a href=\"https:\/\/cntnmcb.com\/ru\/product\/dc-mccb-125a-zmm1-125dc\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\"><img fetchpriority=\"high\" decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/cntnmcb.com\/wp-content\/uploads\/2025\/08\/ZMM1-125DC-2P-2.jpg\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail wvs-archive-product-image\" alt=\"ZMM1-125 2P 125A MCCB DC Molded Case Circuit Breaker\" loading=\"eager\" srcset=\"https:\/\/cntnmcb.com\/wp-content\/uploads\/2025\/08\/ZMM1-125DC-2P-2.jpg 640w, https:\/\/cntnmcb.com\/wp-content\/uploads\/2025\/08\/ZMM1-125DC-2P-2-300x300.jpg 300w, https:\/\/cntnmcb.com\/wp-content\/uploads\/2025\/08\/ZMM1-125DC-2P-2-100x100.jpg 100w, https:\/\/cntnmcb.com\/wp-content\/uploads\/2025\/08\/ZMM1-125DC-2P-2-600x600.jpg 600w, https:\/\/cntnmcb.com\/wp-content\/uploads\/2025\/08\/ZMM1-125DC-2P-2-64x64.jpg 64w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><div class=\"eael-product-title\">\n    <a href=\"https:\/\/cntnmcb.com\/ru\/product\/dc-mccb-125a-zmm1-125dc\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\"><h2 class=\"woocommerce-loop-product__title\">DC MCCB 125A ZMM1-125DC<\/h2><\/a>\n    <\/div>    <a href=\"https:\/\/cntnmcb.com\/ru\/product\/dc-mccb-125a-zmm1-125dc\/\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_6330\" data-quantity=\"1\" class=\"button product_type_simple\" data-product_id=\"6330\" data-product_sku=\"\" aria-label=\"\u041f\u0440\u043e\u0447\u0438\u0442\u0430\u0439\u0442\u0435 \u0431\u043e\u043b\u044c\u0448\u0435 \u043e &ldquo;DC MCCB 125A ZMM1-125DC&rdquo;\" rel=\"nofollow\" data-success_message=\"\">\u041f\u043e\u0434\u0440\u043e\u0431\u043d\u0435\u0435<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_6330\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n    \n<\/div>\n\n<\/li><\/ul>            <\/div>\n        <\/div>\n\n        <script type=\"text\/javascript\">\n            jQuery(document).ready(function($) {\n                var $scope = jQuery(\".elementor-element-2940cc7\");\n                var $products = $('.products', $scope);\n                var $layout_mode = $products.data('layout-mode');\n                \n                if ( $layout_mode === 'masonry' ) {\n                    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data-id=\"6e75691\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">6 benefits you can get from CNTN electric?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-58f3e40 elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"58f3e40\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-e07309a e-con-full e-flex e-con e-child\" data-id=\"e07309a\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-fb85008 elementor-widget__width-inherit elementor-view-default elementor-position-block-start elementor-mobile-position-block-start elementor-widget elementor-widget-icon-box\" data-id=\"fb85008\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon-box.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-icon-box-wrapper\">\n\n\t\t\t\t\t\t<div class=\"elementor-icon-box-icon\">\n\t\t\t\t<span  class=\"elementor-icon\">\n\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-hard-hat\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M480 288c0-80.25-49.28-148.92-119.19-177.62L320 192V80a16 16 0 0 0-16-16h-96a16 16 0 0 0-16 16v112l-40.81-81.62C81.28 139.08 32 207.75 32 288v64h448zm16 96H16a16 16 0 0 0-16 16v32a16 16 0 0 0 16 16h480a16 16 0 0 0 16-16v-32a16 16 0 0 0-16-16z\"><\/path><\/svg>\t\t\t\t<\/span>\n\t\t\t<\/div>\n\t\t\t\n\t\t\t\t\t\t<div class=\"elementor-icon-box-content\">\n\n\t\t\t\t\t\t\t\t\t<h3 class=\"elementor-icon-box-title\">\n\t\t\t\t\t\t<span  >\n\t\t\t\t\t\t\tUltra safe\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/h3>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t<p class=\"elementor-icon-box-description\">\n\t\t\t\t\t\tCNTN uses only high-quality materials to DC manufacture miniature circuit breakers, which ensures you use electricity more safely.\t\t\t\t\t<\/p>\n\t\t\t\t\n\t\t\t<\/div>\n\t\t\t\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fb5731c elementor-widget__width-inherit elementor-view-default elementor-position-block-start elementor-mobile-position-block-start elementor-widget elementor-widget-icon-box\" data-id=\"fb5731c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon-box.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-icon-box-wrapper\">\n\n\t\t\t\t\t\t<div class=\"elementor-icon-box-icon\">\n\t\t\t\t<span  class=\"elementor-icon\">\n\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-far-thumbs-up\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M466.27 286.69C475.04 271.84 480 256 480 236.85c0-44.015-37.218-85.58-85.82-85.58H357.7c4.92-12.81 8.85-28.13 8.85-46.54C366.55 31.936 328.86 0 271.28 0c-61.607 0-58.093 94.933-71.76 108.6-22.747 22.747-49.615 66.447-68.76 83.4H32c-17.673 0-32 14.327-32 32v240c0 17.673 14.327 32 32 32h64c14.893 0 27.408-10.174 30.978-23.95 44.509 1.001 75.06 39.94 177.802 39.94 7.22 0 15.22.01 22.22.01 77.117 0 111.986-39.423 112.94-95.33 13.319-18.425 20.299-43.122 17.34-66.99 9.854-18.452 13.664-40.343 8.99-62.99zm-61.75 53.83c12.56 21.13 1.26 49.41-13.94 57.57 7.7 48.78-17.608 65.9-53.12 65.9h-37.82c-71.639 0-118.029-37.82-171.64-37.82V240h10.92c28.36 0 67.98-70.89 94.54-97.46 28.36-28.36 18.91-75.63 37.82-94.54 47.27 0 47.27 32.98 47.27 56.73 0 39.17-28.36 56.72-28.36 94.54h103.99c21.11 0 37.73 18.91 37.82 37.82.09 18.9-12.82 37.81-22.27 37.81 13.489 14.555 16.371 45.236-5.21 65.62zM88 432c0 13.255-10.745 24-24 24s-24-10.745-24-24 10.745-24 24-24 24 10.745 24 24z\"><\/path><\/svg>\t\t\t\t<\/span>\n\t\t\t<\/div>\n\t\t\t\n\t\t\t\t\t\t<div class=\"elementor-icon-box-content\">\n\n\t\t\t\t\t\t\t\t\t<h3 class=\"elementor-icon-box-title\">\n\t\t\t\t\t\t<span  >\n\t\t\t\t\t\t\tVarious certifications\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/h3>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t<p class=\"elementor-icon-box-description\">\n\t\t\t\t\t\tEvery year, CNTN invests around 1 million RMB in various certifications, including CE, RoHS, ISO9001, and CCC, so you can use our products with confidence.\t\t\t\t\t<\/p>\n\t\t\t\t\n\t\t\t<\/div>\n\t\t\t\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b99e977 elementor-widget__width-inherit elementor-view-default elementor-position-block-start elementor-mobile-position-block-start elementor-widget elementor-widget-icon-box\" data-id=\"b99e977\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon-box.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-icon-box-wrapper\">\n\n\t\t\t\t\t\t<div class=\"elementor-icon-box-icon\">\n\t\t\t\t<span  class=\"elementor-icon\">\n\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-th\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M149.333 56v80c0 13.255-10.745 24-24 24H24c-13.255 0-24-10.745-24-24V56c0-13.255 10.745-24 24-24h101.333c13.255 0 24 10.745 24 24zm181.334 240v-80c0-13.255-10.745-24-24-24H205.333c-13.255 0-24 10.745-24 24v80c0 13.255 10.745 24 24 24h101.333c13.256 0 24.001-10.745 24.001-24zm32-240v80c0 13.255 10.745 24 24 24H488c13.255 0 24-10.745 24-24V56c0-13.255-10.745-24-24-24H386.667c-13.255 0-24 10.745-24 24zm-32 80V56c0-13.255-10.745-24-24-24H205.333c-13.255 0-24 10.745-24 24v80c0 13.255 10.745 24 24 24h101.333c13.256 0 24.001-10.745 24.001-24zm-205.334 56H24c-13.255 0-24 10.745-24 24v80c0 13.255 10.745 24 24 24h101.333c13.255 0 24-10.745 24-24v-80c0-13.255-10.745-24-24-24zM0 376v80c0 13.255 10.745 24 24 24h101.333c13.255 0 24-10.745 24-24v-80c0-13.255-10.745-24-24-24H24c-13.255 0-24 10.745-24 24zm386.667-56H488c13.255 0 24-10.745 24-24v-80c0-13.255-10.745-24-24-24H386.667c-13.255 0-24 10.745-24 24v80c0 13.255 10.745 24 24 24zm0 160H488c13.255 0 24-10.745 24-24v-80c0-13.255-10.745-24-24-24H386.667c-13.255 0-24 10.745-24 24v80c0 13.255 10.745 24 24 24zM181.333 376v80c0 13.255 10.745 24 24 24h101.333c13.255 0 24-10.745 24-24v-80c0-13.255-10.745-24-24-24H205.333c-13.255 0-24 10.745-24 24z\"><\/path><\/svg>\t\t\t\t<\/span>\n\t\t\t<\/div>\n\t\t\t\n\t\t\t\t\t\t<div class=\"elementor-icon-box-content\">\n\n\t\t\t\t\t\t\t\t\t<h3 class=\"elementor-icon-box-title\">\n\t\t\t\t\t\t<span  >\n\t\t\t\t\t\t\t100% product test\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/h3>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t<p class=\"elementor-icon-box-description\">\n\t\t\t\t\t\tCNTN's miniature circuit breakers undergo 100% testing before leaving the factory. This takes a lot of time, but it's worth it. By doing so, we can ensure your electrical safety.\t\t\t\t\t<\/p>\n\t\t\t\t\n\t\t\t<\/div>\n\t\t\t\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-401e780 e-con-full e-flex e-con e-child\" data-id=\"401e780\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-8a1f2ce elementor-widget__width-inherit elementor-view-default elementor-position-block-start elementor-mobile-position-block-start elementor-widget elementor-widget-icon-box\" data-id=\"8a1f2ce\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon-box.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-icon-box-wrapper\">\n\n\t\t\t\t\t\t<div class=\"elementor-icon-box-icon\">\n\t\t\t\t<span  class=\"elementor-icon\">\n\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-far-calendar-check\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M400 64h-48V12c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v52H160V12c0-6.627-5.373-12-12-12h-40c-6.627 0-12 5.373-12 12v52H48C21.49 64 0 85.49 0 112v352c0 26.51 21.49 48 48 48h352c26.51 0 48-21.49 48-48V112c0-26.51-21.49-48-48-48zm-6 400H54a6 6 0 0 1-6-6V160h352v298a6 6 0 0 1-6 6zm-52.849-200.65L198.842 404.519c-4.705 4.667-12.303 4.637-16.971-.068l-75.091-75.699c-4.667-4.705-4.637-12.303.068-16.971l22.719-22.536c4.705-4.667 12.303-4.637 16.97.069l44.104 44.461 111.072-110.181c4.705-4.667 12.303-4.637 16.971.068l22.536 22.718c4.667 4.705 4.636 12.303-.069 16.97z\"><\/path><\/svg>\t\t\t\t<\/span>\n\t\t\t<\/div>\n\t\t\t\n\t\t\t\t\t\t<div class=\"elementor-icon-box-content\">\n\n\t\t\t\t\t\t\t\t\t<h3 class=\"elementor-icon-box-title\">\n\t\t\t\t\t\t<span  >\n\t\t\t\t\t\t\tFactory direct sale\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/h3>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t<p class=\"elementor-icon-box-description\">\n\t\t\t\t\t\tCNTN is a Chinese manufacturer and supplier of miniature circuit breakers (MCBs). We have 30 professional employees ready to serve you.\t\t\t\t\t<\/p>\n\t\t\t\t\n\t\t\t<\/div>\n\t\t\t\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ab8be4c elementor-widget__width-inherit elementor-view-default elementor-position-block-start elementor-mobile-position-block-start elementor-widget elementor-widget-icon-box\" data-id=\"ab8be4c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon-box.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-icon-box-wrapper\">\n\n\t\t\t\t\t\t<div class=\"elementor-icon-box-icon\">\n\t\t\t\t<span  class=\"elementor-icon\">\n\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-bars\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M16 132h416c8.837 0 16-7.163 16-16V76c0-8.837-7.163-16-16-16H16C7.163 60 0 67.163 0 76v40c0 8.837 7.163 16 16 16zm0 160h416c8.837 0 16-7.163 16-16v-40c0-8.837-7.163-16-16-16H16c-8.837 0-16 7.163-16 16v40c0 8.837 7.163 16 16 16zm0 160h416c8.837 0 16-7.163 16-16v-40c0-8.837-7.163-16-16-16H16c-8.837 0-16 7.163-16 16v40c0 8.837 7.163 16 16 16z\"><\/path><\/svg>\t\t\t\t<\/span>\n\t\t\t<\/div>\n\t\t\t\n\t\t\t\t\t\t<div class=\"elementor-icon-box-content\">\n\n\t\t\t\t\t\t\t\t\t<h3 class=\"elementor-icon-box-title\">\n\t\t\t\t\t\t<span  >\n\t\t\t\t\t\t\tFlexible MOQ\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/h3>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t<p class=\"elementor-icon-box-description\">\n\t\t\t\t\t\tWe accept small trial orders for new markets, as well as bulk orders from established distributors and projects.\t\t\t\t\t<\/p>\n\t\t\t\t\n\t\t\t<\/div>\n\t\t\t\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ba90bf3 elementor-widget__width-inherit elementor-view-default elementor-position-block-start elementor-mobile-position-block-start elementor-widget elementor-widget-icon-box\" data-id=\"ba90bf3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon-box.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-icon-box-wrapper\">\n\n\t\t\t\t\t\t<div class=\"elementor-icon-box-icon\">\n\t\t\t\t<span  class=\"elementor-icon\">\n\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-user-graduate\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M319.4 320.6L224 416l-95.4-95.4C57.1 323.7 0 382.2 0 454.4v9.6c0 26.5 21.5 48 48 48h352c26.5 0 48-21.5 48-48v-9.6c0-72.2-57.1-130.7-128.6-133.8zM13.6 79.8l6.4 1.5v58.4c-7 4.2-12 11.5-12 20.3 0 8.4 4.6 15.4 11.1 19.7L3.5 242c-1.7 6.9 2.1 14 7.6 14h41.8c5.5 0 9.3-7.1 7.6-14l-15.6-62.3C51.4 175.4 56 168.4 56 160c0-8.8-5-16.1-12-20.3V87.1l66 15.9c-8.6 17.2-14 36.4-14 57 0 70.7 57.3 128 128 128s128-57.3 128-128c0-20.6-5.3-39.8-14-57l96.3-23.2c18.2-4.4 18.2-27.1 0-31.5l-190.4-46c-13-3.1-26.7-3.1-39.7 0L13.6 48.2c-18.1 4.4-18.1 27.2 0 31.6z\"><\/path><\/svg>\t\t\t\t<\/span>\n\t\t\t<\/div>\n\t\t\t\n\t\t\t\t\t\t<div class=\"elementor-icon-box-content\">\n\n\t\t\t\t\t\t\t\t\t<h3 class=\"elementor-icon-box-title\">\n\t\t\t\t\t\t<span  >\n\t\t\t\t\t\t\tRich export experience\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/h3>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t<p class=\"elementor-icon-box-description\">\n\t\t\t\t\t\tWe have extensive experience exporting products to Europe, the Middle East, Southeast Asia and the Americas, so you can completely trust us.\t\t\t\t\t<\/p>\n\t\t\t\t\n\t\t\t<\/div>\n\t\t\t\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-712cc3f e-flex e-con-boxed e-con e-parent\" data-id=\"712cc3f\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-353f3c4 elementor-widget elementor-widget-heading\" data-id=\"353f3c4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Application Scenarios of DC Miniature Circuit Breakers (MCCB)<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-acef5b7 elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"acef5b7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-fb482f6 e-con-full e-flex e-con e-child\" data-id=\"fb482f6\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-599d8f7 e-con-full e-flex e-con e-child\" data-id=\"599d8f7\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-c25c5c0 elementor-widget elementor-widget-image\" data-id=\"c25c5c0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"640\" height=\"640\" src=\"https:\/\/cntnmcb.com\/wp-content\/uploads\/2025\/09\/DC-MCCB\u65b0\u80fd\u6e90\u6c7d\u8f66.jpg\" class=\"attachment-large size-large wp-image-7060\" alt=\"DC MCCB used in Electric vehicles\" srcset=\"https:\/\/cntnmcb.com\/wp-content\/uploads\/2025\/09\/DC-MCCB\u65b0\u80fd\u6e90\u6c7d\u8f66.jpg 640w, https:\/\/cntnmcb.com\/wp-content\/uploads\/2025\/09\/DC-MCCB\u65b0\u80fd\u6e90\u6c7d\u8f66-300x300.jpg 300w, https:\/\/cntnmcb.com\/wp-content\/uploads\/2025\/09\/DC-MCCB\u65b0\u80fd\u6e90\u6c7d\u8f66-100x100.jpg 100w, https:\/\/cntnmcb.com\/wp-content\/uploads\/2025\/09\/DC-MCCB\u65b0\u80fd\u6e90\u6c7d\u8f66-600x600.jpg 600w, https:\/\/cntnmcb.com\/wp-content\/uploads\/2025\/09\/DC-MCCB\u65b0\u80fd\u6e90\u6c7d\u8f66-64x64.jpg 64w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-28c6d37 elementor-widget elementor-widget-heading\" data-id=\"28c6d37\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h5 class=\"elementor-heading-title elementor-size-default\">Electric vehicles<\/h5>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-08a9e7c elementor-widget elementor-widget-text-editor\" data-id=\"08a9e7c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The working principle of DC MCCBs in new energy vehicles centers on dynamically safeguarding the vehicle&#8217;s high-voltage and low-voltage DC circuits. By monitoring current in real time, responding quickly to faults, and cutting off the circuit, it eliminates risks such as fire and equipment damage. Essentially, it serves as the &#8220;safety guardian&#8221; of the vehicle&#8217;s high-voltage system.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-22dcf13 elementor-align-center elementor-widget__width-inherit elementor-widget elementor-widget-button\" data-id=\"22dcf13\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"#elementor-action%3Aaction%3Dpopup%3Aopen%26settings%3DeyJpZCI6Ijc1ODAiLCJ0b2dnbGUiOmZhbHNlfQ%3D%3D\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Get A Quote<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-238debb e-con-full e-flex e-con e-child\" data-id=\"238debb\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3482914 elementor-widget elementor-widget-image\" data-id=\"3482914\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"640\" height=\"640\" src=\"https:\/\/cntnmcb.com\/wp-content\/uploads\/2025\/09\/DC-MCCB\u7535\u9540\u8bbe\u5907.jpg\" class=\"attachment-large size-large wp-image-7062\" alt=\"DC MCCB used in Eectroplating Equipment\" srcset=\"https:\/\/cntnmcb.com\/wp-content\/uploads\/2025\/09\/DC-MCCB\u7535\u9540\u8bbe\u5907.jpg 640w, https:\/\/cntnmcb.com\/wp-content\/uploads\/2025\/09\/DC-MCCB\u7535\u9540\u8bbe\u5907-300x300.jpg 300w, https:\/\/cntnmcb.com\/wp-content\/uploads\/2025\/09\/DC-MCCB\u7535\u9540\u8bbe\u5907-100x100.jpg 100w, https:\/\/cntnmcb.com\/wp-content\/uploads\/2025\/09\/DC-MCCB\u7535\u9540\u8bbe\u5907-600x600.jpg 600w, https:\/\/cntnmcb.com\/wp-content\/uploads\/2025\/09\/DC-MCCB\u7535\u9540\u8bbe\u5907-64x64.jpg 64w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-be2766c elementor-widget elementor-widget-heading\" data-id=\"be2766c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h5 class=\"elementor-heading-title elementor-size-default\"> Eectroplating Equipment<\/h5>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-54a55c7 elementor-widget elementor-widget-text-editor\" data-id=\"54a55c7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The working principle of DC MCCBs in electroplating\/electrolysis equipment centers on real-time monitoring of DC circuit current. When faults such as overcurrent or short circuit occur in the circuit, it quickly cuts off the circuit to protect equipment and process safety. Essentially, it provides an &#8220;overload protection barrier&#8221; for a stable DC power supply environment.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a4fee20 elementor-align-center elementor-widget__width-inherit elementor-widget elementor-widget-button\" data-id=\"a4fee20\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"#elementor-action%3Aaction%3Dpopup%3Aopen%26settings%3DeyJpZCI6Ijc1ODAiLCJ0b2dnbGUiOmZhbHNlfQ%3D%3D\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Get A Quote<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-d4af983 e-con-full e-flex e-con e-child\" data-id=\"d4af983\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e19b765 elementor-widget elementor-widget-image\" data-id=\"e19b765\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"640\" height=\"640\" src=\"https:\/\/cntnmcb.com\/wp-content\/uploads\/2025\/09\/DC-MCCB\u8f68\u9053\u4ea4\u901a.jpg\" class=\"attachment-large size-large wp-image-7063\" alt=\"DC MCCB used in Rail Transit\" srcset=\"https:\/\/cntnmcb.com\/wp-content\/uploads\/2025\/09\/DC-MCCB\u8f68\u9053\u4ea4\u901a.jpg 640w, https:\/\/cntnmcb.com\/wp-content\/uploads\/2025\/09\/DC-MCCB\u8f68\u9053\u4ea4\u901a-300x300.jpg 300w, https:\/\/cntnmcb.com\/wp-content\/uploads\/2025\/09\/DC-MCCB\u8f68\u9053\u4ea4\u901a-100x100.jpg 100w, https:\/\/cntnmcb.com\/wp-content\/uploads\/2025\/09\/DC-MCCB\u8f68\u9053\u4ea4\u901a-600x600.jpg 600w, https:\/\/cntnmcb.com\/wp-content\/uploads\/2025\/09\/DC-MCCB\u8f68\u9053\u4ea4\u901a-64x64.jpg 64w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5a37c56 elementor-widget elementor-widget-heading\" data-id=\"5a37c56\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h5 class=\"elementor-heading-title elementor-size-default\">Rail Transit<\/h5>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b1200b9 elementor-widget elementor-widget-text-editor\" data-id=\"b1200b9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The working principle of DC Molded Case Circuit Breakers (DC MCCBs) in rail transit mainly involves normal switching (closing and opening), overload and short-circuit protection, and arc extinguishing. They are used in scenarios such as the DC traction systems of subways and light rails, or the DC auxiliary power supply circuits inside vehicles, to protect the circuit safety of traction motors and on-board equipment.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-67b5d94 elementor-align-center elementor-widget__width-inherit elementor-widget elementor-widget-button\" data-id=\"67b5d94\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"#elementor-action%3Aaction%3Dpopup%3Aopen%26settings%3DeyJpZCI6Ijc1ODAiLCJ0b2dnbGUiOmZhbHNlfQ%3D%3D\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Get A Quote<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-4610271 e-con-full e-flex e-con e-child\" data-id=\"4610271\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-270ca4f e-con-full e-flex e-con e-child\" data-id=\"270ca4f\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-498224c elementor-widget elementor-widget-image\" data-id=\"498224c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"640\" src=\"https:\/\/cntnmcb.com\/wp-content\/uploads\/2025\/09\/DC-MCCB-\u98ce\u7535\u7cfb\u7edf.jpg\" class=\"attachment-large size-large wp-image-7067\" alt=\"DC MCCB used in Wind Power System\" srcset=\"https:\/\/cntnmcb.com\/wp-content\/uploads\/2025\/09\/DC-MCCB-\u98ce\u7535\u7cfb\u7edf.jpg 640w, https:\/\/cntnmcb.com\/wp-content\/uploads\/2025\/09\/DC-MCCB-\u98ce\u7535\u7cfb\u7edf-300x300.jpg 300w, https:\/\/cntnmcb.com\/wp-content\/uploads\/2025\/09\/DC-MCCB-\u98ce\u7535\u7cfb\u7edf-100x100.jpg 100w, https:\/\/cntnmcb.com\/wp-content\/uploads\/2025\/09\/DC-MCCB-\u98ce\u7535\u7cfb\u7edf-600x600.jpg 600w, https:\/\/cntnmcb.com\/wp-content\/uploads\/2025\/09\/DC-MCCB-\u98ce\u7535\u7cfb\u7edf-64x64.jpg 64w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a86fda1 elementor-widget elementor-widget-heading\" data-id=\"a86fda1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h5 class=\"elementor-heading-title elementor-size-default\"> Wind Power System<\/h5>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5c39d8e elementor-widget elementor-widget-text-editor\" data-id=\"5c39d8e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"auto-hide-last-sibling-br paragraph-JOTKXA paragraph-element br-paragraph-space\">DC MCCBs\u00a0 safeguard the current safety of critical DC-side circuits in wind power systems. By real-time monitoring current fluctuations of core components such as wind power converters and energy storage units, they can quickly disconnect circuits in the event of overloads and short-circuits. Meanwhile, they are adaptable to the intermittent energy characteristics of wind power. They serve as the &#8220;current safety sentinels&#8221;\u00a0for the DC systems in wind power applications.<\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-38a352e elementor-align-center elementor-widget__width-inherit elementor-widget elementor-widget-button\" data-id=\"38a352e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"#elementor-action%3Aaction%3Dpopup%3Aopen%26settings%3DeyJpZCI6Ijc1ODAiLCJ0b2dnbGUiOmZhbHNlfQ%3D%3D\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Get A Quote<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-a96cbd2 e-con-full e-flex e-con e-child\" data-id=\"a96cbd2\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-9041dc4 elementor-widget elementor-widget-image\" data-id=\"9041dc4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"640\" src=\"https:\/\/cntnmcb.com\/wp-content\/uploads\/2025\/09\/\u4eea\u8868-\u5199\u5b57\u697c-3.jpg\" class=\"attachment-large size-large wp-image-8149\" alt=\"DC MCCB used in Commercial Building\" srcset=\"https:\/\/cntnmcb.com\/wp-content\/uploads\/2025\/09\/\u4eea\u8868-\u5199\u5b57\u697c-3.jpg 640w, https:\/\/cntnmcb.com\/wp-content\/uploads\/2025\/09\/\u4eea\u8868-\u5199\u5b57\u697c-3-300x300.jpg 300w, https:\/\/cntnmcb.com\/wp-content\/uploads\/2025\/09\/\u4eea\u8868-\u5199\u5b57\u697c-3-100x100.jpg 100w, https:\/\/cntnmcb.com\/wp-content\/uploads\/2025\/09\/\u4eea\u8868-\u5199\u5b57\u697c-3-600x600.jpg 600w, https:\/\/cntnmcb.com\/wp-content\/uploads\/2025\/09\/\u4eea\u8868-\u5199\u5b57\u697c-3-64x64.jpg 64w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2900b02 elementor-widget elementor-widget-heading\" data-id=\"2900b02\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h5 class=\"elementor-heading-title elementor-size-default\"> Commercial Building<\/h5>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7c177f8 elementor-widget elementor-widget-text-editor\" data-id=\"7c177f8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"auto-hide-last-sibling-br paragraph-JOTKXA paragraph-element br-paragraph-space\">When it comes to power supply in commercial buildings,\u00a0no margin for error is acceptable. Our DC Molded Case Circuit Breakers (DC MCCBs), equipped with the dual advantages of &#8220;robust protection and intelligent control&#8221;, accurately meet the core demands of commercial buildings for power supply reliability and intelligent management\u2014ensuring every kilowatt-hour of electricity is &#8220;stable for the present and intelligently controlled for the future&#8221;.<\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-aa2207f elementor-align-center elementor-widget__width-inherit elementor-widget elementor-widget-button\" data-id=\"aa2207f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"#elementor-action%3Aaction%3Dpopup%3Aopen%26settings%3DeyJpZCI6Ijc1ODAiLCJ0b2dnbGUiOmZhbHNlfQ%3D%3D\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Get A Quote<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-309b659 e-con-full e-flex e-con e-child\" data-id=\"309b659\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-0cb9c2d elementor-widget elementor-widget-image\" data-id=\"0cb9c2d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"640\" src=\"https:\/\/cntnmcb.com\/wp-content\/uploads\/2025\/09\/DC-MCCB\u822a\u5929\u822a\u7a7a.jpg\" class=\"attachment-large size-large wp-image-7071\" alt=\"DC MCCB used in Aerospace Systems\" srcset=\"https:\/\/cntnmcb.com\/wp-content\/uploads\/2025\/09\/DC-MCCB\u822a\u5929\u822a\u7a7a.jpg 640w, https:\/\/cntnmcb.com\/wp-content\/uploads\/2025\/09\/DC-MCCB\u822a\u5929\u822a\u7a7a-300x300.jpg 300w, https:\/\/cntnmcb.com\/wp-content\/uploads\/2025\/09\/DC-MCCB\u822a\u5929\u822a\u7a7a-100x100.jpg 100w, https:\/\/cntnmcb.com\/wp-content\/uploads\/2025\/09\/DC-MCCB\u822a\u5929\u822a\u7a7a-600x600.jpg 600w, https:\/\/cntnmcb.com\/wp-content\/uploads\/2025\/09\/DC-MCCB\u822a\u5929\u822a\u7a7a-64x64.jpg 64w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6087deb elementor-widget elementor-widget-heading\" data-id=\"6087deb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h5 class=\"elementor-heading-title elementor-size-default\"> Aerospace Systems<\/h5>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-80bc57d elementor-widget elementor-widget-text-editor\" data-id=\"80bc57d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"auto-hide-last-sibling-br paragraph-JOTKXA paragraph-element br-paragraph-space\">In aerospace systems,\u00a0 DC MCCBs ensure the absolute reliability of DC power supplies under extreme operating conditions. By adapting to special environments such as high-altitude low pressure, intense vibration, and wide temperature fluctuations, they continuously monitor the current in on-board DC circuits, accurately and quickly disconnect circuits in the event of overloads and short-circuits, while preventing misoperations.<\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ab393e9 elementor-align-center elementor-widget__width-inherit elementor-widget elementor-widget-button\" data-id=\"ab393e9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"#elementor-action%3Aaction%3Dpopup%3Aopen%26settings%3DeyJpZCI6Ijc1ODAiLCJ0b2dnbGUiOmZhbHNlfQ%3D%3D\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Get A Quote<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-a1efdf4 e-con-full e-flex e-con e-child\" data-id=\"a1efdf4\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-427dbda elementor-widget elementor-widget-heading\" data-id=\"427dbda\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Where do you want to use our MCBs?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fad9454 elementor-widget elementor-widget-button\" data-id=\"fad9454\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"#elementor-action%3Aaction%3Dpopup%3Aopen%26settings%3DeyJpZCI6Ijc1ODAiLCJ0b2dnbGUiOmZhbHNlfQ%3D%3D\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Click here<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-27f01e4 e-flex e-con-boxed e-con e-parent\" data-id=\"27f01e4\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-88648c7 elementor-widget elementor-widget-heading\" data-id=\"88648c7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Frequently Asked Questions<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a76b0bb elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"a76b0bb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4ea50a7 elementor-widget elementor-widget-n-accordion\" data-id=\"4ea50a7\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;default_state&quot;:&quot;expanded&quot;,&quot;max_items_expended&quot;:&quot;one&quot;,&quot;n_accordion_animation_duration&quot;:{&quot;unit&quot;:&quot;ms&quot;,&quot;size&quot;:400,&quot;sizes&quot;:[]}}\" data-widget_type=\"nested-accordion.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"e-n-accordion\" aria-label=\"Accordion. Open links with Enter or Space, close with Escape, and navigate with Arrow Keys\">\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-8240\" class=\"e-n-accordion-item\" open>\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"1\" tabindex=\"0\" aria-expanded=\"true\" aria-controls=\"e-n-accordion-item-8240\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> What is a DC Molded Case Circuit Breaker? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-8240\" class=\"elementor-element elementor-element-c21a793 e-con-full e-flex e-con e-child\" data-id=\"c21a793\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-83aad01 elementor-widget elementor-widget-text-editor\" data-id=\"83aad01\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"auto-hide-last-sibling-br paragraph-JOTKXA paragraph-element br-paragraph-space\">DC molded case circuit breakers are electrical devices used for overload and short-circuit protection in DC power distribution systems.<\/div><div>\u00a0<\/div><div class=\"auto-hide-last-sibling-br paragraph-JOTKXA paragraph-element br-paragraph-space\">They are a type of <span style=\"color: #ff0000;\"><a style=\"color: #ff0000;\" href=\"https:\/\/cntnmcb.com\/molded-case-circuit-breaker\/\">molded case circuit breaker<\/a><\/span> specifically designed for DC applications, and their functions are similar to AC molded case circuit breakers. Some products can be extended with auxiliary functions such as undervoltage release and shunt trip.<\/div><div>\u00a0<\/div><div class=\"auto-hide-last-sibling-br paragraph-JOTKXA paragraph-element br-paragraph-space\">They are widely used in DC power supply scenarios such as photovoltaic power plants, energy storage systems, communication base stations, and rail transit.<\/div><div class=\"auto-hide-last-sibling-br paragraph-JOTKXA paragraph-element br-paragraph-space\">\u00a0<\/div><div class=\"auto-hide-last-sibling-br paragraph-JOTKXA paragraph-element br-paragraph-space\">\u00a0<\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-8241\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"2\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-8241\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> What is the working principle of a DC Molded Case Circuit Breaker <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-8241\" class=\"elementor-element elementor-element-3fc6e6f e-con-full e-flex e-con e-child\" data-id=\"3fc6e6f\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-d6e888d elementor-widget elementor-widget-text-editor\" data-id=\"d6e888d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"auto-hide-last-sibling-br paragraph-JOTKXA paragraph-element br-paragraph-space\">The core working mechanism of a DC Molded Case Circuit Breaker (DC MCCB) is a closed-loop process of\u00a0&#8220;real-time monitoring &#8211; fault identification &#8211; rapid interruption&#8221;. It accurately addresses overload and short-circuit faults in DC circuits and resolves the challenge of DC arc extinguishing through the collaborative operation of three built-in key systems.<\/div><div>\u00a0<\/div><h3 class=\"header-vfC6AV auto-hide-last-sibling-br\">1. Core Working Logic: Three-Step Fault Protection<\/h3><div class=\"auto-hide-last-sibling-br paragraph-JOTKXA paragraph-element br-paragraph-space\">The working process of a DC MCCB centers on &#8220;protection triggered by abnormal current&#8221; and is specifically divided into three stages:<\/div><h5 class=\"header-vfC6AV auto-hide-last-sibling-br\"><strong>Step 1: Current Monitoring<\/strong><\/h5><div class=\"auto-hide-last-sibling-br paragraph-JOTKXA paragraph-element br-paragraph-space\">When the circuit operates normally, the main circuit current flows through the\u00a0current detection components\u00a0(such as bimetallic strips and electromagnetic coils) inside the circuit breaker.<\/div><div>\u00a0<\/div><div class=\"auto-hide-last-sibling-br paragraph-JOTKXA paragraph-element br-paragraph-space\">These components &#8220;sense&#8221; the current magnitude in real time. At this point, the current remains within the rated range, the components do not act, and the circuit stays conducting.<\/div><div>\u00a0<\/div><h5 class=\"header-vfC6AV auto-hide-last-sibling-br\">Step 2: Fault Identification<\/h5><div class=\"auto-hide-last-sibling-br paragraph-JOTKXA paragraph-element br-paragraph-space\">When a fault occurs in the circuit, the detection components trigger different responses based on the fault type:<\/div><ul class=\"auto-hide-last-sibling-br\"><li><strong>Overload Fault<\/strong>: When the current exceeds the rated value but does not reach the short-circuit level (e.g., motor stalling), the bimetallic strip bends due to the thermal effect of the current, pushing the mechanical mechanism to trigger tripping.<\/li><li><strong>Short-Circuit Fault<\/strong>: When the current surges to several times or even dozens of times the rated value (e.g., line short-circuit), the electromagnetic coil generates a strong magnetic field, which attracts the iron core to quickly strike the tripping mechanism, achieving &#8220;instantaneous tripping&#8221;.<\/li><\/ul><h5 class=\"header-vfC6AV auto-hide-last-sibling-br\">Step 3: Circuit Interruption and Arc Extinguishing<\/h5><div class=\"auto-hide-last-sibling-br paragraph-JOTKXA paragraph-element br-paragraph-space\">After the tripping mechanism acts, it drives the\u00a0<strong>movable and fixed contacts<\/strong>\u00a0of the circuit breaker to separate quickly, cutting off the main circuit.<\/div><div>\u00a0<\/div><div class=\"auto-hide-last-sibling-br paragraph-JOTKXA paragraph-element br-paragraph-space\">Meanwhile, since DC current has &#8220;no zero-crossing point and a long arc duration&#8221;, the built-in\u00a0DC-specific arc-extinguishing chamber\u00a0(usually containing metal grid plates and insulating partitions) splits and cools the arc, forcing it to extinguish. This prevents the arc from burning the contacts or causing safety accidents.<\/div><h3 class=\"header-vfC6AV auto-hide-last-sibling-br\">2. Key Designs: Core Differences for Adapting to DC Scenarios<\/h3><div class=\"auto-hide-last-sibling-br paragraph-JOTKXA paragraph-element br-paragraph-space\">Compared with AC circuit breakers, the working principle of DC MCCBs includes two key optimizations to adapt to DC characteristics:<\/div><ul class=\"auto-hide-last-sibling-br\"><li><strong>Arc-Extinguishing System Optimization<\/strong>: To address the difficulty of extinguishing DC arcs, the arc-extinguishing chamber adopts a &#8220;multi-grid splitting + strong magnetic field drive&#8221; design. This splits long arcs into multiple short arcs, rapidly reducing arc energy and ensuring the circuit is completely de-energized after interruption.<\/li><li><strong>Tripping Characteristic Adaptation<\/strong>: DC circuits have no current zero-crossing point, and short-circuit current peaks are higher with longer durations. Therefore, electromagnetic trip units have higher sensitivity and faster response speeds, capable of triggering interruption within milliseconds to prevent equipment from enduring excessive inrush current.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-8242\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"3\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-8242\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> Types of DC Molded Case Circuit Breakers \uff08DC MCCB\uff09 <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-8242\" class=\"elementor-element elementor-element-2721f03 e-con-full e-flex e-con e-child\" data-id=\"2721f03\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6a98855 elementor-widget elementor-widget-text-editor\" data-id=\"6a98855\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"auto-hide-last-sibling-br paragraph-JOTKXA paragraph-element br-paragraph-space\">DC MCCBs are classified based on core functional characteristics and application scenarios to meet diverse protection needs of DC circuits. The main types include:<\/div><ul class=\"auto-hide-last-sibling-br\"><li><div class=\"auto-hide-last-sibling-br paragraph-JOTKXA paragraph-element br-paragraph-space\"><strong>By Tripping Mechanism<\/strong><\/div><ul class=\"auto-hide-last-sibling-br\"><li><strong>Thermal-Magnetic DC MCCBs<\/strong>: Integrate dual protection of &#8220;bimetallic strip (for overload)&#8221; and &#8220;electromagnetic coil (for short circuit)&#8221;. Suitable for general DC scenarios (e.g., industrial auxiliary circuits, small energy storage systems) with simple structure and cost-effectiveness.<\/li><\/ul><\/li><\/ul><ul><li style=\"list-style-type: none;\"><ul class=\"auto-hide-last-sibling-br\"><li><strong>Electronic DC MCCBs<\/strong>: Adopt electronic current sensors and microprocessors for precise current monitoring. Support adjustable protection parameters (e.g., overload trip time, short-circuit current threshold) and are ideal for complex DC systems (e.g., large-scale photovoltaic stations, rail transit traction circuits) requiring flexible protection<\/li><\/ul><\/li><\/ul><ul class=\"auto-hide-last-sibling-br\"><li><div class=\"auto-hide-last-sibling-br paragraph-JOTKXA paragraph-element br-paragraph-space\"><strong>By Breaking Capacity<\/strong><\/div><ul class=\"auto-hide-last-sibling-br\"><li><strong>Low Breaking Capacity DC MCCBs<\/strong>: Designed for low-current DC circuits (usually \u2264 10kA breaking current), used in household energy storage, communication base station auxiliary circuits, etc.<\/li><\/ul><\/li><\/ul><ul class=\"auto-hide-last-sibling-br\"><li style=\"list-style-type: none;\"><ul class=\"auto-hide-last-sibling-br\"><li><strong>High Breaking Capacity DC MCCBs<\/strong>: With breaking current up to 50kA or higher, they withstand large short-circuit energy and are applied in high-power scenarios (e.g., industrial DC drives, ship propulsion systems).<\/li><\/ul><\/li><li><div class=\"auto-hide-last-sibling-br paragraph-JOTKXA paragraph-element br-paragraph-space\"><strong>By Installation and Structural Form<\/strong><\/div><ul class=\"auto-hide-last-sibling-br\"><li><strong>Fixed DC MCCBs<\/strong>: Fixed on electrical cabinets or distribution boards via screws, with stable installation. Common in stationary DC power systems (e.g., ground traction substations, industrial control cabinets).<\/li><li><strong>Plug-In DC MCCBs<\/strong>: Can be plugged into matching sockets, enabling quick disassembly for maintenance. Suitable for scenarios requiring frequent device replacement (e.g., modular energy storage cabinets, mobile power supplies).<\/li><\/ul><\/li><li><div class=\"auto-hide-last-sibling-br paragraph-JOTKXA paragraph-element br-paragraph-space\"><strong>By Special Application Adaptability<\/strong><\/div><ul class=\"auto-hide-last-sibling-br\"><li><strong>Environmentally Resistant DC MCCBs<\/strong>: With enhanced protection (e.g., IP65 dustproof and waterproof, corrosion-resistant materials) for harsh environments like marine (high salt spray), deserts (high dust), or high-altitude areas (low pressure).<\/li><li><strong>Rail Transit-Specific DC MCCBs<\/strong>: Feature vibration resistance (complying with EN 50155) and wide temperature adaptability (-40\u2103 to 85\u2103), used in subway onboard circuits and ground traction power distribution.<\/li><li><strong>New Energy-Specific DC MCCBs<\/strong>: Optimized for photovoltaic\/storage characteristics (e.g., anti-PV array reverse current, compatible with battery charging\/discharging fluctuations), applied in PV combiner boxes and energy storage PCS circuits.<\/li><\/ul><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-8243\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"4\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-8243\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> The Differences Between AC Circuit Breakers and DC Circuit Breakers <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-8243\" class=\"elementor-element elementor-element-ec4a47b e-con-full e-flex e-con e-child\" data-id=\"ec4a47b\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3335c82 elementor-widget elementor-widget-text-editor\" data-id=\"3335c82\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The main difference between AC molded case circuit breakers and DC molded case circuit breakers lies in the type of current they handle.<\/p><p>AC molded case circuit breakers are designed specifically for handling alternating current, while DC molded case circuit breakers are designed for handling direct current and are suitable for specific applications such as solar power, batteries, and traction systems.<\/p><p><br \/>The design and internal structure of these two types also differ. AC contactors utilize thermal-magnetic tripping, with a thermal element detecting overcurrent and a magnetic element detecting short circuits.<\/p><p>This dual protection mechanism ensures efficient and reliable operation of the electrical equipment.<\/p><p>DC molded case circuit breakers, on the other hand, generally contain an electronic tripping mechanism.<\/p><p>This mechanism utilizes advanced electronic technology to provide precise overload and short-circuit protection in DC circuits.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-8244\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"5\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-8244\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> Can DC MCCB be used for AC? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-8244\" class=\"elementor-element elementor-element-74019b6 e-con-full e-flex e-con e-child\" data-id=\"74019b6\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-41b923c elementor-widget elementor-widget-text-editor\" data-id=\"41b923c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>AC molded case circuit breakers cannot be used directly in DC circuits. The core reason is that they &#8220;cannot extinguish the DC arc,&#8221; and their design is fundamentally incompatible with DC operating conditions.<\/p><p>Arc extinction is the biggest challenge: AC has &#8220;current zero-crossing points,&#8221; while DC does not, and the insulation and breaking capacity are insufficient.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-8245\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"6\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-8245\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> Does DC MCCB trip on high voltage? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-8245\" class=\"elementor-element elementor-element-31ad111 e-con-full e-flex e-con e-child\" data-id=\"31ad111\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-94cafbc elementor-widget elementor-widget-text-editor\" data-id=\"94cafbc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The tripping principle of a DC molded case circuit breaker is that it only responds to current, not voltage.<\/p><p>However, abnormally high voltage can indirectly cause it to trip and may also damage the DC circuit breaker.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-8246\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"7\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-8246\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> How many types of MCCB are there? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-8246\" class=\"elementor-element elementor-element-708a661 e-con-full e-flex e-con e-child\" data-id=\"708a661\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e87751a elementor-widget elementor-widget-text-editor\" data-id=\"e87751a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>DC molded case circuit breakers can be classified according to their application into: distribution type DC molded case circuit breakers, motor protection type DC molded case circuit breakers, and earth leakage protection type DC molded case circuit breakers.<\/p><p>According to their breaking capacity level, they can be divided into Type B (standard breaking capacity), Type S (higher breaking capacity), and Type H (high breaking capacity).<\/p><p>By the number of poles, they can be classified into 2-pole, 3-pole, and 4-pole.<\/p><p>According to the installation method, they can be divided into fixed type and draw-out type.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-8247\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"8\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-8247\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> How to install DC MCCB breaker? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-8247\" class=\"elementor-element elementor-element-e14cc48 e-con-full e-flex e-con e-child\" data-id=\"e14cc48\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4dbde78 elementor-widget elementor-widget-text-editor\" data-id=\"4dbde78\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Before installing a DC molded case circuit breaker, all DC power sources to the circuit being installed must be disconnected and verified to be de-energized. Installation personnel must take appropriate safety precautions to prevent electric shock.<\/p><p>It is necessary to verify whether the parameters of the DC circuit breaker match the parameters of the DC circuit.<\/p><p>Ensure the installation environment is dry, free from corrosive gases and dust accumulation, and that the ambient temperature is within the product&#8217;s specified range.<\/p><p>Based on the required installation method (fixed or drawer-type), select the appropriate mounting bracket. Insert the DC circuit breaker into the mounting slot in the cabinet, or secure it to the mounting plate with bolts.<\/p><p>The product must be installed in a way that ensures the handle is exposed, facilitating easy opening and closing during daily operation.<\/p><p>During installation, the polarity must be clearly identified, and reverse connection is strictly prohibited. Use copper core wires that match the rated current, ensure the wire stripping length is compatible with the terminals, and make sure the connections are secure. Implement arc suppression measures, and select accessories as needed.<\/p><p>After installation, a visual inspection is required to ensure that the wiring is secure, there are no incorrect or missing connections, and the operating handle moves smoothly during opening and closing operations.<\/p><p>Next, we will perform functional testing, including manual opening and closing tests, tripping tests, and accessory function tests.<\/p><p>It is important to note that DC molded case circuit breakers cannot be used in AC circuits. After installation, circuit labels should be attached to facilitate future maintenance.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-8248\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"9\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-8248\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> What certifications do our products have? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-8248\" class=\"elementor-element elementor-element-b4bfae7 e-con-full e-flex e-con e-child\" data-id=\"b4bfae7\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2a7de90 elementor-widget elementor-widget-text-editor\" data-id=\"2a7de90\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>CNTN\u2019s DC MCCB are certified with both CCC and CE certificates.<\/p><p>The\u00a0<span style=\"color: #ff0000;\"><a style=\"color: #ff0000;\" href=\"https:\/\/cntnmcb.com\/certificates\/\">CCC certificate<\/a><\/span>\u00a0is the strictest certification in China, guaranteeing the highest level of safety and minimizing the risk of fire and electric shock during use.<\/p><p>If you require other certifications, such as UL, CSA, UKCA, ETL, or RoHS, we can also provide them upon request. Please\u00a0<span style=\"color: #ff0000;\"><a style=\"color: #ff0000;\" href=\"https:\/\/cntnmcb.com\/contact-us\/\">contact us<\/a><\/span>\u00a0for more information.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<script type=\"application\/ld+json\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What is a DC Molded Case Circuit Breaker?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"DC molded case circuit breakers are electrical devices used for overload and short-circuit protection in DC power distribution systems.\\u00a0They are a type of molded case circuit breaker specifically designed for DC applications, and their functions are similar to AC molded case circuit breakers. Some products can be extended with auxiliary functions such as undervoltage release and shunt trip.\\u00a0They are widely used in DC power supply scenarios such as photovoltaic power plants, energy storage systems, communication base stations, and rail transit.\\u00a0\\u00a0\"}},{\"@type\":\"Question\",\"name\":\"What is the working principle of a DC Molded Case Circuit Breaker\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The core working mechanism of a DC Molded Case Circuit Breaker (DC MCCB) is a closed-loop process of\\u00a0&#8220;real-time monitoring &#8211; fault identification &#8211; rapid interruption&#8221;. It accurately addresses overload and short-circuit faults in DC circuits and resolves the challenge of DC arc extinguishing through the collaborative operation of three built-in key systems.\\u00a01. Core Working Logic: Three-Step Fault ProtectionThe working process of a DC MCCB centers on &#8220;protection triggered by abnormal current&#8221; and is specifically divided into three stages:Step 1: Current MonitoringWhen the circuit operates normally, the main circuit current flows through the\\u00a0current detection components\\u00a0(such as bimetallic strips and electromagnetic coils) inside the circuit breaker.\\u00a0These components &#8220;sense&#8221; the current magnitude in real time. At this point, the current remains within the rated range, the components do not act, and the circuit stays conducting.\\u00a0Step 2: Fault IdentificationWhen a fault occurs in the circuit, the detection components trigger different responses based on the fault type:Overload Fault: When the current exceeds the rated value but does not reach the short-circuit level (e.g., motor stalling), the bimetallic strip bends due to the thermal effect of the current, pushing the mechanical mechanism to trigger tripping.Short-Circuit Fault: When the current surges to several times or even dozens of times the rated value (e.g., line short-circuit), the electromagnetic coil generates a strong magnetic field, which attracts the iron core to quickly strike the tripping mechanism, achieving &#8220;instantaneous tripping&#8221;.Step 3: Circuit Interruption and Arc ExtinguishingAfter the tripping mechanism acts, it drives the\\u00a0movable and fixed contacts\\u00a0of the circuit breaker to separate quickly, cutting off the main circuit.\\u00a0Meanwhile, since DC current has &#8220;no zero-crossing point and a long arc duration&#8221;, the built-in\\u00a0DC-specific arc-extinguishing chamber\\u00a0(usually containing metal grid plates and insulating partitions) splits and cools the arc, forcing it to extinguish. This prevents the arc from burning the contacts or causing safety accidents.2. Key Designs: Core Differences for Adapting to DC ScenariosCompared with AC circuit breakers, the working principle of DC MCCBs includes two key optimizations to adapt to DC characteristics:Arc-Extinguishing System Optimization: To address the difficulty of extinguishing DC arcs, the arc-extinguishing chamber adopts a &#8220;multi-grid splitting + strong magnetic field drive&#8221; design. This splits long arcs into multiple short arcs, rapidly reducing arc energy and ensuring the circuit is completely de-energized after interruption.Tripping Characteristic Adaptation: DC circuits have no current zero-crossing point, and short-circuit current peaks are higher with longer durations. Therefore, electromagnetic trip units have higher sensitivity and faster response speeds, capable of triggering interruption within milliseconds to prevent equipment from enduring excessive inrush current.\"}},{\"@type\":\"Question\",\"name\":\"Types of DC Molded Case Circuit Breakers \\uff08DC MCCB\\uff09\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"DC MCCBs are classified based on core functional characteristics and application scenarios to meet diverse protection needs of DC circuits. The main types include:By Tripping MechanismThermal-Magnetic DC MCCBs: Integrate dual protection of &#8220;bimetallic strip (for overload)&#8221; and &#8220;electromagnetic coil (for short circuit)&#8221;. Suitable for general DC scenarios (e.g., industrial auxiliary circuits, small energy storage systems) with simple structure and cost-effectiveness.Electronic DC MCCBs: Adopt electronic current sensors and microprocessors for precise current monitoring. Support adjustable protection parameters (e.g., overload trip time, short-circuit current threshold) and are ideal for complex DC systems (e.g., large-scale photovoltaic stations, rail transit traction circuits) requiring flexible protectionBy Breaking CapacityLow Breaking Capacity DC MCCBs: Designed for low-current DC circuits (usually \\u2264 10kA breaking current), used in household energy storage, communication base station auxiliary circuits, etc.High Breaking Capacity DC MCCBs: With breaking current up to 50kA or higher, they withstand large short-circuit energy and are applied in high-power scenarios (e.g., industrial DC drives, ship propulsion systems).By Installation and Structural FormFixed DC MCCBs: Fixed on electrical cabinets or distribution boards via screws, with stable installation. Common in stationary DC power systems (e.g., ground traction substations, industrial control cabinets).Plug-In DC MCCBs: Can be plugged into matching sockets, enabling quick disassembly for maintenance. Suitable for scenarios requiring frequent device replacement (e.g., modular energy storage cabinets, mobile power supplies).By Special Application AdaptabilityEnvironmentally Resistant DC MCCBs: With enhanced protection (e.g., IP65 dustproof and waterproof, corrosion-resistant materials) for harsh environments like marine (high salt spray), deserts (high dust), or high-altitude areas (low pressure).Rail Transit-Specific DC MCCBs: Feature vibration resistance (complying with EN 50155) and wide temperature adaptability (-40\\u2103 to 85\\u2103), used in subway onboard circuits and ground traction power distribution.New Energy-Specific DC MCCBs: Optimized for photovoltaic\\\/storage characteristics (e.g., anti-PV array reverse current, compatible with battery charging\\\/discharging fluctuations), applied in PV combiner boxes and energy storage PCS circuits.\"}},{\"@type\":\"Question\",\"name\":\"The Differences Between AC Circuit Breakers and DC Circuit Breakers\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The main difference between AC molded case circuit breakers and DC molded case circuit breakers lies in the type of current they handle.AC molded case circuit breakers are designed specifically for handling alternating current, while DC molded case circuit breakers are designed for handling direct current and are suitable for specific applications such as solar power, batteries, and traction systems.The design and internal structure of these two types also differ. AC contactors utilize thermal-magnetic tripping, with a thermal element detecting overcurrent and a magnetic element detecting short circuits.This dual protection mechanism ensures efficient and reliable operation of the electrical equipment.DC molded case circuit breakers, on the other hand, generally contain an electronic tripping mechanism.This mechanism utilizes advanced electronic technology to provide precise overload and short-circuit protection in DC circuits.\"}},{\"@type\":\"Question\",\"name\":\"Can DC MCCB be used for AC?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"AC molded case circuit breakers cannot be used directly in DC circuits. The core reason is that they &#8220;cannot extinguish the DC arc,&#8221; and their design is fundamentally incompatible with DC operating conditions.Arc extinction is the biggest challenge: AC has &#8220;current zero-crossing points,&#8221; while DC does not, and the insulation and breaking capacity are insufficient.\"}},{\"@type\":\"Question\",\"name\":\"Does DC MCCB trip on high voltage?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The tripping principle of a DC molded case circuit breaker is that it only responds to current, not voltage.However, abnormally high voltage can indirectly cause it to trip and may also damage the DC circuit breaker.\"}},{\"@type\":\"Question\",\"name\":\"How many types of MCCB are there?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"DC molded case circuit breakers can be classified according to their application into: distribution type DC molded case circuit breakers, motor protection type DC molded case circuit breakers, and earth leakage protection type DC molded case circuit breakers.According to their breaking capacity level, they can be divided into Type B (standard breaking capacity), Type S (higher breaking capacity), and Type H (high breaking capacity).By the number of poles, they can be classified into 2-pole, 3-pole, and 4-pole.According to the installation method, they can be divided into fixed type and draw-out type.\"}},{\"@type\":\"Question\",\"name\":\"How to install DC MCCB breaker?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Before installing a DC molded case circuit breaker, all DC power sources to the circuit being installed must be disconnected and verified to be de-energized. Installation personnel must take appropriate safety precautions to prevent electric shock.It is necessary to verify whether the parameters of the DC circuit breaker match the parameters of the DC circuit.Ensure the installation environment is dry, free from corrosive gases and dust accumulation, and that the ambient temperature is within the product&#8217;s specified range.Based on the required installation method (fixed or drawer-type), select the appropriate mounting bracket. Insert the DC circuit breaker into the mounting slot in the cabinet, or secure it to the mounting plate with bolts.The product must be installed in a way that ensures the handle is exposed, facilitating easy opening and closing during daily operation.During installation, the polarity must be clearly identified, and reverse connection is strictly prohibited. Use copper core wires that match the rated current, ensure the wire stripping length is compatible with the terminals, and make sure the connections are secure. Implement arc suppression measures, and select accessories as needed.After installation, a visual inspection is required to ensure that the wiring is secure, there are no incorrect or missing connections, and the operating handle moves smoothly during opening and closing operations.Next, we will perform functional testing, including manual opening and closing tests, tripping tests, and accessory function tests.It is important to note that DC molded case circuit breakers cannot be used in AC circuits. After installation, circuit labels should be attached to facilitate future maintenance.\"}},{\"@type\":\"Question\",\"name\":\"What certifications do our products have?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"CNTN\\u2019s DC MCCB are certified with both CCC and CE certificates.The\\u00a0CCC certificate\\u00a0is the strictest certification in China, guaranteeing the highest level of safety and minimizing the risk of fire and electric shock during use.If you require other certifications, such as UL, CSA, UKCA, ETL, or RoHS, we can also provide them upon request. Please\\u00a0contact us\\u00a0for more information.\"}}]}<\/script>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-8555a95 e-flex e-con-boxed e-con e-parent\" data-id=\"8555a95\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2facaef elementor-widget elementor-widget-heading\" data-id=\"2facaef\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Our certifications<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-31cc0d3 elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"31cc0d3\" 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short-circuit protection, and [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"site-sidebar-layout":"no-sidebar","site-content-layout":"page-builder","ast-site-content-layout":"full-width-container","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center 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