Non-reversing vacuum contactors are used to switch capacitors, transformers, and electric motors where overload protection is provided separately. Vacuum contactors have ratings from 135 to 540 Amps. This NEMA 5 contactor has a 270 Amp rating. This NEMA size 5 contactor has a 270 Amp rating. This makes the terminal blocks easier to get at in deep panels. Accessories are available for vacuum contactors. The coil in this contactor is rated for 110/120 VAC 50/60 Hz. This contactor doesn't have an enclosure. Vacuum contactors are UL listed and CSA certified for global applications.