The NC7 series AC contactor is mainly used for remotely closing and breaking circuits,and can be combined with an appropriate thermal overload relay to form a electromagnetic starter so as to protect the circuits likely to be overloaded in operation; the contact is well suited for frequently starting and controlling AC motors. Rating up to 690V, 620A, AC 50/60Hz, usage category of AC-3/400V This product meets the standard of IEC60947-4-1