Thermal Unit Trip Class 20 Overload Protection Type Melting Alloy Full Load Current 1.26 to 1.33 A 1.3 to 1.37 A 1.34 to 1.42 A 1.41 to 1.48 A 1.42 to 1.51 A 1.46 to 1.56 A Frame Size A S Compatible with Grainger Part Number 1H385 1H386 1H387 1H388 1H389 1H39 1H392 1H393 2BV58 2BV66 2BV67 2BV71 2BV72 48P274 48P276 48P277