Mitsubishi DSN400-SW-3P-400A 3-Pole 400A Circuit Breaker

The Mitsubishi DSN400-SW-3P-400A (DSN400-SW-3P-400A) is a heavy-duty three-pole circuit breaker engineered for reliable power distribution, system protection, and circuit isolation across commercial and industrial electrical installations. Designed by Mitsubishi Electric, this 400 A device is built for integration into industrial switchboards, control panels, motor control centers, and machinery power distribution systems. It provides robust electrical switching and circuit management, supporting dependable operation in challenging industrial environments. Operating as a 3-pole 400 A unit, the device secures electrical distribution networks against power disruptions while allowing safe manual disconnection and maintenance isolation. It serves critical functions in automation facilities, manufacturing plants, facility infrastructure, and process machinery where continuous, dependable performance is essential. With its proven Mitsubishi engineering, the unit delivers consistent mechanical durability and electrical performance across its operational lifespan. This circuit breaker is suitable for replacement, system retrofits, or new electrical control installations requiring a dependable 400 A three-phase power distribution solution.