Thermal Unit Trip Class 20 Overload Protection Type Melting Alloy Full Load Current 4.95 to 5.62 A 5.12 to 5.84 A 5.37 to 5.87 A 5.45 to 6.24 A 5.57 to 6.22 A 5.86 to 6.41 A 5.89 to 6.56 A 6.17 to 6.75 A 6.37 to 6.99 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