CJX2-D series AC contactor is suitable for using in the circuits up to the rated voltage 660V AC 50Hz or 60Hz,rated current up to 660A, for making,breaking,frequently starting & controlling the AC motor, combined with the auxiliary contact block, timer delay & machine-interlicking device etc ,it becomes the delay contactor,mechanical interlocking contactor,star-edlta starter.with the thermal relay,it is combined into the electromagnetic starter.