S-N series AC Contactor is suitable for using in the circuits up to the rated voltage 660V AC 50Hz or 60Hz, rated current up to 800A, for making, breaking, frequently starting & controlling the AC motor. Combined with the auxiliary contact block, delay timer & machine-interlocking device etc, it becomes the delay contactor, mechanical interlocking contactor, star-delta starter. With the thermal overload relay, it is combined into the electromagnetic starter. The Contactor is produced according to IEC60947-4.