DNLC1 Series AC Contactor (hereinafter called the contactor) is suitable to be used in the circuit of AC 50Hz or 60Hz, voltage up to 660V, current up to 95A, for switching on and switching off the circuit in long distance and frequently stating and controlling the AC motors. This contactor can be assembled into building-block auxiliary contactor group and the accessories of air time-delay head, mechanical interlock mechanism and so on, into time-delay contactor, reversible contactor, star-delta starter and can be directly plugged and installed with thermoelectric device and assembled into electromagnetic starter.