DC500V 250A Molded Case Circuit Breaker

Advantages and Applications

1. Superior DC Arc Extinguishing Capability

Direct current (DC) lacks a natural current zero-crossing point, making the arc generated during interruption extremely difficult to extinguish. GREENWATT's DC500V 250A molded case circuit breaker utilizes a widened arc-extinguishing grid and optimized magnetic blowout technology to break and extinguish DC arcs under 500V high voltage in an extremely short time, preventing contact burn-out.

2. Dual Protection Mechanism

This DC MCCB integrates precise thermal and magnetic tripping mechanisms.

● Thermal Protection (Overload): Monitors long-term current fluctuations to prevent insulation aging caused by overheating.

● Magnetic Protection (Short Circuit): Achieves millisecond-level instantaneous interruption for short-circuit currents up to 20KA, protecting the energy storage battery and inverter core components.

3. Environmental Adaptability and Operating Frequency

The DC500V 250A molded case circuit breaker uses flame-retardant reinforced housing material with excellent insulation performance. It can not only serve as a protective element, but also support high-frequency circuit switching and isolation operations, and is widely used in industrial DC distribution cabinets and distributed energy systems.

Why Choose Our DC MCCB?

Zhejiang Dong'an Electric Co., Ltd. (GREENWATT) is a modern enterprise integrating design, manufacturing, sales, and service, with nearly 30 years of experience in the electrical industry.

Comprehensive Certification Support: Our products cover mainstream international certifications such as CE, CB, TUV, and CCC.

Manufacturing Strength: The company possesses advanced automated testing lines, including short-circuit current testers, overload testers, and medium-speed stamping machines. All DC500V 250A molded case circuit breaker undergoes rigorous testing in a RoHS 2.0 laboratory.

Customized Solutions: We support OEM production based on customer-provided drawings or samples. Before mass production, we provide sample confirmation to ensure that the delivered quality meets technical requirements.

Systematic Management: The factory has passed ISO9001, ISO14001, and ISO45001 certifications, committed to achieving a balance between scientific research and quality control.

FAQ

Q: Does this DC500V 250A molded case circuit breaker support reverse wiring?

A: This DC molded case circuit breaker has specific polarity requirements. To ensure breaking capacity and safety, it is recommended to wire according to the positive and negative terminals indicated on the product label. If your system has special requirements, please communicate with our technical team in advance.

Q: In which scenarios is the 20KA breaking capacity suitable?

A: The 20KA Icu can meet the protection needs of most medium and large-sized photovoltaic power plant combiner boxes and industrial battery energy storage systems (BESS), effectively protecting the system from damage in the event of a metallic short circuit.

Q: How do I determine the rated current I need?

A: The rated current should be determined based on the continuous operating current of the load. It is generally recommended to set the circuit breaker's In value to 1.25 times the maximum operating current of the load. GREENWATT offers a variety of specifications from 10A to 250A.