Thermal Unit Trip Class 20 Overload Protection Type Melting Alloy Full Load Current 2.46 to 2.65 A 2.51 to 2.66 A 2.61 to 2.77 A 2.69 to 2.87 A 2.74 to 2.86 A 2.76 to 2.84 A 2.78 to 2.99 A 2.83 to 3.08 A 2.93 to 3.16 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