MCCB circuit breaker CSDM7-63H-4300 CSDM7-63-4300 4P 63A 63a mccb industrial circuit breaker thermal and magnetic circuit breaker

Unique 4-pole simultaneous switching design. Disconnects all three phase lines and the neutral line (L1/L2/L3+N), ensuring 100% complete electrical isolation of the supply circuit, eliminating maintenance hazards and providing the highest level of electrical safety compliance.And achieves an astounding 50kA breaking capacity. This means even in the most extreme short-circuit events, it can safely interrupt the fault current with immense speed and completely extinguish the destructive arc generated, firmly localizing the fault and preventing cascading failures upstream—the ultimate insurance for your critical distribution nodes.The ideal choice as the main incoming power switch and distribution section main switch in various buildings, especially hospitals, shopping malls, factories, and telecom base stations.