DC Miniature circuit breaker

  1. Over 10 years of experience in manufacturing DC Miniature Circuit Breakers (MCB).
  2. Fast production delivery capability
  3. Provide product customization
  4. We provide 24-hour online service to you

Our products

Our compact DC circuit breakers integrate overload protection, short-circuit protection, and isolation functions, ensuring the stable operation and electrical safety of your DC power distribution system.

Application Scenarios of DC Miniature Circuit Breakers (MCB)

DC Miniature Circuit Breakers (MCB) are applied in Rail Transit

In rail transit, it resists vibration and tolerates a wide temperature range (-40℃~85℃), adapting to train jolts and extreme outdoor temps. With millisecond-fast response, it instantly cuts circuits if traction systems short-circuit, protecting train traction motors and passenger safety.

Application Of DC Miniature Circuit Breakers In Ships

When used on ships, its core advantage is precisely meeting the ship DC system’s needs for harsh environment resistance, critical power protection and space saving. It solves unique circuit protection pain points during navigation, reliably safeguarding the ship’s low-voltage DC equipment and emergency systems.

DC Miniature Circuit Breakers (MCB) are used in Vessel

For EV charging stations, it’s the ideal choice that perfectly Our compact DC circuit breaker features instant fault response and space-saving installation. It completely eliminates hazards like overloading and short circuits during charging, ensuring every charging session is both efficient and worry-free!

DCMCB are applied in the New Energy

When used for charging piles, it precisely meets their core needs: high current tolerance, fast fault response and space-saving installation. It addresses hazards like overload/short circuit during charging, reliably protecting charging piles’ DC circuits and users’ equipment.

DC MCB are used in Felectric Vehicle

Our DC MCB the core requirements of the on-board DC system in electric vehicles, including robust safety protection, optimal space adaptability, and reliable performance under harsh environments. It ensures every journey stays completely free from electrical hazards

DC MCB are applied in Rail Transit
Our DC circuit breakers meet the core needs of communication base stations: high reliability, easy integration, and low maintenance. They address critical pain points like unexpected power outages and equipment damage, providing pivotal protection for the stable operation of core base station equipment.

What is your application?

Frequently Asked Questions

What Is Aminiature DC Circuit Breaker?

A miniature DC circuit breaker is a protective electrical device for DC circuits. It is mainly used in DC lines with a rated voltage ranging from 250V to 1000V and a rated operating current ranging from 1A to 60A, capable of providing overload and short-circuit protection for DC lines as well as enabling infrequent switching of the lines.

 

Miniature DC circuit breakers feature first-class current-limiting performance, which can accurately protect relay protection devices and automatic devices from hazards caused by faults such as overload and short circuit. Adopting a special arc-extinguishing and current-limiting system, they can quickly interrupt the fault current in DC power distribution systems, significantly improving the grading coordination and preventing accidents like overstepping tripping between the measurement and protection panel and the distribution panel in the DC system of power engineering.

How MCBs work?

The core function of a small DC circuit breaker is to monitor the circuit status via its internal sensitive components. When faults such as overload or short circuit occur, it quickly cuts off the circuit to provide protection.

 

Types of Miniature Circuit Breakers (MCB)

Miniature DC circuit breakers (MCBs) are mainly classified based on their tripping protection mechanisms and application scenario requirements, with four core types in total. Each type corresponds to differentiated circuit protection functions:
  1. Thermal-magnetic miniature DC circuit breakers
  2. Electronic miniature DC circuit breakers
  3. Selective miniature DC circuit breakers
  4. Application-specific miniature DC circuit breakers

Please contact us if you have any questions

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