DC circuit breakers play a critical role in protecting electrical circuits from damage caused by overcurrents or short circuits. They automatically interrupt the flow of current when it exceeds a predetermined level, preventing fires, equipment damage, and other hazards.

The DC circuit breakers we produce can effectively protect your circuit’s safety and are a very cost-effective solution. Our R&D expert team has more than 10 years of industry experience, has a comprehensive understanding of market demand, and can manufacture modular circuit breakers according to your specifications. All products have industry-recognized product certification, and the quality is guaranteed. We have five fully automated production lines for producing circuit breakers, with a monthly production capacity of 100,000 pieces, which we can deliver on time for your order. Place your bulk order today and enjoy our amazing wholesale prices that are better than the competition.

To understand why it is necessary to know by it, we must understand what is a DC circuit breaker. A circuit breaker is an automatically operated electrical switch connected to your electrical system. DC circuit breakers prevent major damage to circuits due to excessive current flow, usually caused by a system short circuit.


Play Video about MOREDAY CIRCUIT BREAKER Automated production line




We have accumulated a lot of experience and reputation in the industry, have a good track record, and provide high-quality products and services.


Ensure adherence to international quality standards and compliance with relevant safety regulations. There are certifications such as ISO, UL, CE, and ROHS to ensure that the products are reliable, safe, and environmentally friendly.


We offer custom options to meet your specific requirements. This can include custom ratings, materials, or configurations. Flexibility in order quantities, lead times, and shipping options to align with your business operations.


We have a strong R&D department focused on developing innovative and efficient circuit breaker designs. This ensures that products are always kept up-to-date with the latest technological advancements and industry standards.


We have a robust quality control process. This includes rigorous testing at all stages of production to ensure the final product meets or exceeds industry standards, including dielectric withstand testing, short circuit testing, and mechanical durability testing, among others.


We provide comprehensive after-sales support, including technical assistance, troubleshooting, and warranty service. Ensuring customer satisfaction also demonstrates our commitment to the reliability and performance of their products.

Common Queries

Frequently Asked Questions

You'll find answers about our products. If your question is not answered below,
please feel free to contact us.
The main function of the DC breaker is to automatically interrupt the current flow when it exceeds a predetermined level, thereby protecting the circuit from damage caused by overcurrent or short circuits.
Moreday’s DC MCCB has passed ISO, CE, ROHS,TUV and other certifications to ensure that the products are reliable, safe, and environmentally friendly. You can purchase with confidence, we have a professional team to serve you.
DC current breakers are commonly used in renewable energy systems, electric vehicles, data centers, railway traction systems, and industrial automation control systems.
Because we have high-quality products, access to the latest technology, provide the best customization service options, excellent after-sales support, and comply with international quality standards and safety regulations, our customers can buy with confidence.
If the dc circuit breakers trip frequently, you can solve the problem by following these steps:
Check circuit loading: Make sure the total wattage of all equipment connected to this circuit breaker does not exceed the rated capacity of the circuit breaker. If it exceeds, try reducing the load, such as unplugging some equipment or moving them to other circuits.
Check wiring: Check that all wiring is secure and shows no signs of damage or wear. Incorrect or aged wiring can cause a short circuit or poor contact, causing the circuit breaker to trip.
Detect short circuits or ground faults: Use a multimeter to check for short circuits or ground faults. This type of problem requires a professional electrician to diagnose and repair it.
Replace the circuit breaker: If none of the above steps resolves the problem, you may want to consider replacing the circuit breaker itself.
Consult a professional electrician: If you’re not sure how to fix the problem yourself, or the problem is complex and requires specialized skills, it’s best to contact a qualified electrician for inspection and repairs.
Make sure to turn off the power source when handling any electrical safety equipment.
Preventing the problem of loose Miniature Circuit Breakers wires can be achieved through the following methods:
Proper installation: Make sure you follow the manufacturer’s instructions when installing, use the correct tools and techniques, and make sure all connections are tight and correctly placed.
Regular Inspections: Perform regular visual inspections to check all wiring for signs of looseness, wear, or corrosion. This inspection should include an inspection of terminal blocks and contact points.
Use the Proper Torque: Use a torque wrench when wiring to ensure the terminal blocks are at the recommended torque setting, this will prevent over-tightening or loosening.
Anti-vibration measures: Circuit breakers operating in a vibrating environment should adopt additional anti-vibration measures, such as locking washers or spring washers, to reduce looseness caused by vibration.
Environmental considerations: Make sure the DC MCB and its wiring are suitable for its operating environment and avoid extreme temperatures and humidity, which can cause materials to expand or contract, affecting the tightness of connections.

Make Electricity Available To All People


Get A Free Consultation
And Quote

Download Our Full Catalogue
moreday Solar DC Product Selection Manual

Get notified about new products