Thermal Unit Trip Class 20 Overload Protection Type Melting Alloy Full Load Current 2.19 to 2.45 A 2.32 to 2.5 A 2.34 to 2.73 A 2.39 to 2.6 A 2.39 to 2.75 A 2.46 to 2.82 A 2.47 to 2.68 A 2.47 to 2.77 A 2.57 to 2.92 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