Thermal Unit Trip Class 20 Overload Protection Type Melting Alloy Full Load Current 0.89 to 0.98 A 0.91 to 0.97 A 0.94 to 1.01 A 0.94 to 1.05 A 0.97 to 1.04 A 0.98 to 1.08 A 0.99 to 1.12 A 1.02 to 1.15 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