DC MCB

A DC MCB (Direct Current Miniature Circuit Breaker) is a protective device used to automatically disconnect DC circuits when there’s an overcurrent, like a short circuit or overload. It’s designed specifically to handle the constant, one-directional flow of current in DC systems.

You can usually find this information printed on the MCB label or datasheet. DC MCBs are clearly marked with voltage ratings like “DC 500V”, “DC 1000V”, or “DC 1500V”. AC MCBs are marked with “230/400V~” or similar. Additionally, the symbol “~” represents AC, while “⎓” or “—” indicates DC.

Connecting a DC MCB is similar to an AC one, but polarity matters in some models. For non-polarized MCBs, you can connect either side to positive or negative. Always follow the wiring diagram, ensure tight connections, and mount the breaker securely on the DIN rail. If unsure, consult an electrician familiar with DC systems.

Our DC MCBs are specially designed for high-performance in photovoltaic (PV) and energy storage system (ESS) applications. With fast tripping, modular design, and international certifications like IEC and CE, they provide safe, efficient protection against overcurrent and surges.

Yes. Every breaker undergoes strict electrical and mechanical life testing. For example, miniature circuit breakers rated below 125A are tested to perform up to 2000 cycles. Our molded case DC breakers are tested up to 10,000 cycles depending on current rating. We also run high/low temperature testing (-20℃ to 70℃) and glow wire flame resistance tests to ensure reliability in harsh environments.

Absolutely. With in-house manufacturing and full OEM/ODM capabilities, we can customize your circuit breakers with your brand name, packaging, and specifications. Whether you need a unique design or small batch flexibility, we’re ready to support your brand’s growth.

Yes. We support low minimum order quantities to help brands scale efficiently, and offer factory-direct wholesale discounts to maximize your profit margins. Just contact our team to get a custom quote.

Our breakers are certified to international standards like IEC and CE, and designed with IP65/IP66 protection grades for outdoor and harsh environments. You can count on both electrical safety and enclosure durability.

Our team responds within 12 hours to all inquiries. With automated production and streamlined logistics, we can process most orders quickly and deliver on time, even for bulk and custom requests.

With years of experience, advanced in-house manufacturing, and continuous innovation, we offer not just products—but partnership. From technical support to market-ready product design, we’re here to help your brand grow with confidence.