B65-63DC DC Miniature Circuit Breaker (MCB) — Safe & Reliable Protection for DC Systems
The B65-63DC is a purpose-built DC Miniature Circuit Breaker engineered specifically for DC distribution circuits up to 1500V. Designed and manufactured by Baiwei Electric (BOVVT), this MCB solves the critical challenge of DC arc extinction — unlike AC systems, DC current has no natural zero-crossing point, making arc quenching significantly more difficult. The B65-63DC features advanced arc-chute technology and precision thermal-magnetic tripping to ensure safe, reliable interruption of fault currents in DC applications. Available in 1P/2P/3P/4P configurations with rated currents up to 63A and a 6kA short-circuit breaking capacity, it is the ideal protective device for photovoltaic arrays, energy storage systems, EV charging stations, telecommunications base stations, and lithium battery equipment.
Key Features
- DC-Specific Arc Extinction: Engineered with specialized arc-chute design to safely extinguish DC arcs that lack natural zero-crossing points. This ensures reliable circuit interruption and prevents dangerous arc faults in DC systems — a critical safety advantage over standard AC breakers.
- Precision Thermal-Magnetic Tripping: Dual-element protection combines thermal overload protection and magnetic short-circuit protection, precisely matched to DC load characteristics. Ensures fast, accurate disconnection under fault conditions while maintaining stable operation under normal DC loads.
- Flame-Retardant Modular Housing: Constructed with high-grade flame-retardant insulating materials, designed for seamless integration into new energy equipment assemblies. Standard DIN 35mm rail mounting enables quick, tool-assisted installation in compact control cabinets and PV combiner boxes.
Technical Specifications
| Parameter |
Value |
| Model |
B65-63DC |
| Product Type |
DC Miniature Circuit Breaker |
| Rated Voltage (Un) |
500V / 800V / 1500V |
| Rated Current (In) |
32A / 63A |
| Short-Circuit Breaking Capacity (Icn) |
6kA |
| Poles |
1P / 2P / 3P / 4P |
| Mounting Type |
DIN Rail (35mm) |
Typical Applications (DC Systems)
- Photovoltaic (PV) array string protection and DC side safety
- Energy storage battery bank protection and DC distribution
- EV charging stations and electric vehicle infrastructure
- Telecommunications base stations and DC power supply systems
- Lithium battery equipment and industrial DC power systems
- Marine DC power systems and off-grid DC microgrids
Why Choose BOVVT DC MCBs?
All BOVVT DC Miniature Circuit Breakers are manufactured under strict ISO-certified quality management systems, ensuring consistent performance and long-term reliability in demanding DC environments. We offer comprehensive OEM/ODM services, including custom rated voltages, rated currents, tripping characteristics, branding, and packaging. Whether you need standard configurations or bespoke solutions for specialized DC applications, our B65-63DC MCBs are engineered to meet the highest safety standards and global market requirements. Contact us today for a quote or to discuss your custom requirements!
