FeaturesSelect heater coils based on full load current (FLA) shown on motor nameplateHeater coils are rated to protect 40 deg C rise and a service factor of 1.151-phase starters requires 2 heaters, 3-phase requires 3 heaters15.2 to 16.7 A, 18.4 to 20 A non-compensating full load currentType A and b overload relay