3 Pole Reversing Contactors with Screw Clamp Termination Contactors have a switching voltage of 440Vac and a coil consumption (ac coils 50/60Hz rated) of 4.5VA (Hold in) and 30VA (inrush). These are complete units, that is two 'K' series contactors coupled together Incorporates mechanical interlock to ensure only one set of 3 poles are closed at any one time