Type S non-reversing magnetic contactors are used to switch heating loads, capacitors, transformers, and electric motors where overload protection is provided separately. Type S contactors have ratings up to 810 Amps. This NEMA 4 contactor has a 135 Amp rating. This NEMA size 4 contactor has a 135 Amp rating. Type S contactors are available in 1, 2, 3, 4 and 5 pole versions. This is a 3 pole contactor. These contactors are available with a wide variety of replaceable coil voltages. The coil in this contactor is rated for 110/120 VAC 50/60 Hz. This contactor is wired for separate control. This contactor doesn't have an enclosure. A wide variety of accessories are available for Type S contactors. Type S contactors are UL listed and CSA certified for global applications.