Thermal Unit Trip Class 20 Overload Protection Type Melting Alloy Full Load Current 0.56 to 0.6 A 0.58 to 0.61 A 0.59 to 0.63 A 0.59 to 0.64 A 0.59 to 0.65 A 0.62 to 0.65 A 0.63 to 0.67 A 0.65 to 0.69 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