Thermal Unit Trip Class 20 Overload Protection Type Melting Alloy Full Load Current 24.6 to 26.3 A 25.3 to 26.8 A 26 to 27.8 A 26.2 to 28.1 A 27.4 to 29.4 A 27.6 to 29.4 A 27.6 to 29.6 A 27.7 to 29.7 A 27.9 to 30.1 A 29.4 to 31.5 A NEMA Size 3 Frame Size CC S