Thermal Unit Trip Class 20 Overload Protection Type Melting Alloy Full Load Current 0.73 to 0.79 A 0.74 to 0.8 A 0.77 to 0.83 A 0.78 to 0.84 A 0.79 to 0.85 A 0.8 to 0.86 A 0.82 to 0.88 A 0.82 to 0.89 A 0.85 to 0.91 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