Thermal Unit Trip Class 20 Overload Protection Type Melting Alloy Full Load Current 2.66 to 2.9 A 2.67 to 2.85 A 2.78 to 2.98 A 2.85 to 3.06 A 2.87 to 3.14 A 2.88 to 3.07 A 3 to 3.26 A 3.09 to 3.39 A 3.17 to 3.48 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