Thermal Unit Trip Class 20 Overload Protection Type Melting Alloy Full Load Current 2 to 2.18 A 2 to 2.31 A 2.05 to 2.38 A 2.14 to 2.33 A 2.16 to 2.38 A 2.19 to 2.46 A 2.23 to 2.45 A 2.26 to 2.46 A 2.32 to 2.56 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