Type S nonreversing magnetic contactors are used to switch heating loads, capacitors, transformers, and electric motors where overload protection is provided separately. Type S non-reversing magnetic NEMA motor starters are for motor control applications. This E coil modification kit is used on size 5 contactors and starters. This kit is for devices that have a 440/480 VAC 50/60 Hz coil. This E coil modification kit is for 440/480 VAC 50/60 Hz.