EC1-F series AC contactors are suitable for frequency 50/60Hz, rated insulationvoltage up to 1000V, rated operation current 9~150A under AC-3 duty. It is mainly used for making and breaking electric circuits at a long distance & for frequent strarting, stopping & controlling AC Motors. It is used in combination with thrmal relay to compose a magnetic motor starter. The products comply with IEC6047-4.