Thermal Unit Trip Class 20 Overload Protection Type Melting Alloy Full Load Current 0.38 to 0.4 A 0.39 to 0.4 A 0.39 to 0.43 A 0.4 to 0.41 A 0.41 to 0.44 A 0.41 to 0.45 A 0.42 to 0.46 A 0.43 to 0.44 A 0.43 to 0.47 A Frame Size A S Compatible Grainger Part Number 1H385 1H386 1H387 1H388 1H389 1H39 1H392 1H393 2BV58 2BV66 2BV67 2BV71 2BV72 48P274 48P276 48P277