0102030405
BY03-63DC MCB 4.5kA DC Miniature Circuit Breaker
product detail
Product Features
- The BY03-63DC series 4.5kA DC miniature circuit breaker (MCB)is a reliable and robust solution designed to protect DC electrical systems from overload and short-circuit conditions. With a rated current of up to 63A and available in 1P, 2P, and 4P configurations, it supports voltage levels of 250VDC, 500VDC, and 1000VDC. This makes it suitable for a variety of DC applications, including solar power installations, industrial DC distribution systems, and electric vehicle infrastructure.
- Built with a flame-retardant casing, the BY03-63DC series MCB ensures enhanced safety by reducing the risk of fire even in challenging operating environments. The high-quality material used in the housing not only improves fire resistance but also offers excellent durability, ensuring reliable performance over an extended lifespan. Its compact design allows for easy installation in space-constrained applications.
- The BY03-63DC series MCB features an advanced tripping mechanism that provides rapid and precise protection against overload and short-circuit events. The circuit breaker has a 4.5kA breaking capacity, making it highly effective in handling large fault currents and protecting equipment from potential damage. This ensures the safety and stability of your electrical system.
- Designed for versatility, this circuit breaker is compatible with a wide range of DC systems and can be easily integrated into various applications. The flame-retardant construction, combined with superior electrical performance, ensures reliable operation and user safety. Whether used in renewable energy systems, industrial applications, or electric mobility solutions, the BY03-63DC series MCB delivers dependable protection.
Technical Parameters
| Type | Values |
| Rated Current In | 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A |
| Poles | 1P, 2P, 4P |
| Rated Voltage Ue | 1P: 250VDC; 2P: 500VDC; 4P: 1000VDC |
| Rated Insulation Voltage Ui | 1250V |
| Rated Ultimate Short-circuit Breaking Capacity lcu | 4.5kA |
| Rated Service Short-circuit Breaking Capacity Ics | 4.5kA |
| Rated Impulse Withstand Voltage Uimp | 4kV |
| Tripping Curve | B, C |
| Function | Over-current, short-circuit |
Dimensions







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