Contactor, Circuit Breaker, Relay manufacturer / supplier in China, offering 3p 4p MCCB Cm1 Type High Breaking MCCB Moulded Case Circuit Breaker, Type Cm1 Circuit Breaker MCCB Rating 3 Pole MCCB, 3p 500~630A MCCB 160 AMP Moulded Case Circuit Breaker MCB and so on.