Thermal Unit Trip Class 20 Overload Protection Type Melting Alloy Full Load Current 28.3 to 30 A 28.5 to 30.3 A 29.9 to 31.7 A 30.1 to 32.1 A 31.5 to 33.2 A 31.6 to 33.7 A 31.8 to 33.9 A 31.9 to 34.2 A 32.6 to 35.1 A 34 to 36.2 A NEMA Size 3 Frame Size CC S