Thermal Unit Trip Class 20 Overload Protection Type Melting Alloy Full Load Current 36.4 to 40.2 A 37.7 to 40 A 39.9 to 42.3 A 40.2 to 42.6 A 41.7 to 44.7 A 41.8 to 44.8 A 42.4 to 44.9 A 42.6 to 45 A 44.1 to 47.2 A 45.4 to 48.3 A NEMA Size 3 4 Frame Size CC S