Thermal Unit Trip Class 20 Overload Protection Type Melting Alloy Full Load Current 5.63 to 6.39 A 5.85 to 6.7 A 5.88 to 6.43 A 6.23 to 6.89 A 6.25 to 7.21 A 6.42 to 6.79 A 6.57 to 7.18 A 6.76 to 7 A 7 to 7.67 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