Thermal Unit Trip Class 20 Overload Protection Type Melting Alloy Full Load Current 1.34 to 1.44 A 1.38 to 1.48 A 1.43 to 1.52 A 1.49 to 1.6 A 1.52 to 1.62 A 1.57 to 1.67 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