W73 - Allen-Bradley Overload Relay Heater
Heater Element, Eutectic Alloy Type Overload Relay, Bulletin 500 Line Starters, Trip Class 20, Type W, Size 3 (Full Load Amps 67), Size 4 (Full Load Amps 74)
Allen-Bradley standard overload relay protection is provided using Type W heater elements for the 500 Line. This provides Class 20 operation and is recommended for General Applications.