Table of Contents
Product Overview
The QJCM3DC‑320HU DC MCCB is one of the most advanced DC molded case circuit breakers available today, engineered with international‑level design and manufacturing technology to deliver reliable protection and durable performance in direct current electrical systems.
DC molded case circuit breakers like the QJCM3DC series are designed specifically for DC environments where arc extinguishing is more challenging than AC systems. Unlike conventional AC breakers, DC MCCBs must interrupt current that does not cross zero, requiring more effective arc quenching and rapid fault isolation.
Key Features & Benefits
Robust DC Protection: Protects DC circuits against overload, short circuits, and system faults for enhanced operational safety.
High Current Rating: Designed for rated currents up to 320A, supporting large DC power systems.
Enhanced Arc Extinguishing: Tailored arc‑quenching design for DC systems to reduce damage risk and improve safety.
International Standards: Built using advanced design technology compliant with global electrical standards.
Modular & Compact: Space‑saving molded case design for easy installation in cabinets, combiner boxes, or DC distribution panels.
Wide Application Reach: Suitable for solar PV systems, battery energy storage systems (BESS), EV charging infrastructure, industrial DC networks, and more.
Technical Specifications
Applications & Use Cases
Solar PV and Renewable Energy
The QJCM3DC‑320HU DC MCCB is ideal for photovoltaic DC combiner boxes and solar panel protection systems, safeguarding array strings and downstream equipment.Battery Storage and Microgrids
It is used in DC battery racks and energy storage systems where reliable fault interruption is critical.EV Charging Stations
The breaker ensures safe operation of high-power DC charging circuits and protects against overloads or short circuits.Industrial DC Power Systems
Suitable for DC-driven machinery, industrial drives, and DC power distribution panels that require robust protection.
FAQ
The QJCM3DC‑320HU is rated for up to 320A and supports DC voltages typically up to 1500V, making it ideal for solar PV, battery storage, and industrial DC systems.
Yes. This DC molded case circuit breaker is specifically designed for photovoltaic arrays, energy storage systems, and EV charging stations to ensure safe and reliable DC fault protection.
No. The no-polarity design allows flexible wiring and reduces the risk of incorrect installation.
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