JU1 Series DC Molded Case Circuit Breaker is designed for protection and isolation in DC power distribution systems, especially for applications such as photovoltaic power generation, energy storage systems, and industrial DC networks. It is suitable for DC operating voltages up to 250V, 500V, 750V, and 1000V, depending on the model and application requirements.The breaker supports a wide range of rated currents, typically from 16A up to 800A, making it suitable for both branch circuits and main circuits in DC systems. It provides reliable overload and short-circuit protection, helping to protect cables, equipment, and connected loads from electrical faults.Optimized for DC applications, the molded case circuit breaker features a dedicated arc-extinguishing structure designed to safely interrupt DC fault currents. The breaking capacity varies by model and can reach 10kA to 50kA, ensuring safe disconnection under fault conditions.DC MCCBs are available in multiple pole configurations, including 1P, 2P, 3P, and 4P, allowing flexible system design. Protection mechanisms may include thermal-magnetic or electronic trip units, depending on the required protection accuracy and system complexity.With a robust molded case housing and clear ON/OFF operating handle indication, the breaker can also be used as a manual isolating device during maintenance. It is designed for fixed installation in distribution cabinets, control panels, and electrical enclosures, offering stable mechanical performance and long service life in DC applications.