Thermal Unit, Trip Class 20, Overload Protection Type Melting Alloy, Full Load Current 51.7 to 54.2 A, 53.5 to 57.4 A, 56.6 to 60.7 A, 56.9 to 60.9 A, 57.5 to 60.6 A, 60 to 63.3 A, 60 to 64.2 A, 60.2 to 64.3 A, 64.6 to 69.5 A, 65.5 to 69.6 A, NEMA Size 3, 4, Frame Size CC, S