Motortronics MVF Series 7.2kV Class - 400A, ‘Non-Latching’ and ‘Latching’ Series of medium voltage three-phase vacuum contactors can be used in power systems with a rated voltage up to 7.2 kV and can be used for continuous AC operating currents of up to 400 amperes. Control voltage for the contactor is AC/DC 100~125V or AC/DC 200~230V*, including an auxiliary relay with 3 NO and 2NC contacts.