DC MCB 63A 500V DC Circuit Breaker for Solar PV Combiner Box A compact DC miniature circuit breaker rated 63A and 500V for 2 input 2 output, 2string configurations in off grid solar energy systems and photovoltaic arrays. Designed to provide reliable overcurrent and short circuit protection and to simplify string isolation and maintenance. Key benefits Protects PV strings and downstream equipment from overloads and short circuits, reducing the risk of component damage. Simplifies system maintenance by allowing easy isolation of individual strings without shutting down the whole array. Supports reliable operation of off grid solar installations, helping to maintain continuous energy production and reduce downtime. Fits typical combiner box layouts that require two inputs and two outputs for twostring configurations. Features and specifications Model and color: DC MCB 63A Rated current: 63A Rated voltage: 500V DC Configuration: 2 input 2 output, 2string Function: DC circuit breaker for overcurrent protection and string isolation in photovoltaic systems Compatibility and use Designed for off grid solar energy systems and photovoltaic arrays requiring a 2string combiner arrangement. Compatible with PV combiner boxes that accept a 2 input 2 output circuit breaker rated at 500V DC and 63A. Suitable for integration into small and medium off grid systems, remote power installations, and standalone solar arrays. Practical applications Combiner box protection: Install in a PV combiner box to protect and isolate two parallel strings feeding an inverter or charge controller. Remote cabin or off grid sites: Use to protect string conductors and simplify servicing of off grid solar setups at remote properties. Small commercial or agricultural solar arrays: Provide perstring protection and quick isolation during troubleshooting or maintenance. Installation and operation notes Install according to local electrical codes and the system design. Ensure correct wiring polarity and secure connections to maintain safe DC operation. Select circuit breaker placement and cable sizes consistent with the 63A rating and 500V DC system voltage. Use this breaker as part of a complete PV protection scheme alongside fuses, surge protection, and proper grounding as required by the system design. This DC MCB 63A 500V breaker offers a straightforward protection and isolation solution for 2string off grid PV systems and combiner boxes.