JU-DCB1 DC miniature circuit breaker is designed for branch circuit protection in DC power systems. It is suitable for common DC applications with operating voltages typically up to 250V, 1000V, or higher, depending on the model and system configuration.The breaker supports a wide range of rated currents, generally from 6A to 63A, making it suitable for protecting cables and loads of different capacities. It adopts a thermal-magnetic tripping mechanism, providing reliable response to overload and short-circuit faults in DC circuits.Optimized for DC operation, the DC MCB features an improved arc-extinguishing structure, ensuring safe interruption of DC fault currents. It is available in multiple pole configurations, such as 1P, 2P, 3P, and 4P, allowing flexible design for various DC systems.With a compact modular design, the DC miniature circuit breaker is suitable for DIN rail mounting, enabling easy installation in distribution boards, combiner boxes, and control panels. Clear ON/OFF indication and stable mechanical performance also allow the breaker to be used as a manual isolating device during maintenance.DC miniature circuit breakers are widely used together with other DC protection devices to form a complete and reliable DC protection solution in photovoltaic and energy storage systems.