Thermal Unit Trip Class 20 Overload Protection Type Melting Alloy Full Load Current 10.9 to 12.1 A 9.7 to 10.5 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