It applies to the circuit with AC 50Hz, rated insulating voltage 660V,rated working voltage AC 380V. .

FNM1(4P) Series Moulded Case Circuit Breaker 1.Wire connection type:Frontplate connection;Backplate connection;Plug-in connection.2.Over-current tripping type: thermal-electromagnetic(combined) type; Electromagnetic type.3.A type: Without over-current trip,N pole keeps connecting.B type: Without over-current trip,N pole operate swith other three poles.C type: With over-current trip,N pole operate swith other three poles.D type: With over-current trip,N pole keeps connecting.

MCCB