Thermal Unit Trip Class 20 Overload Protection Type Melting Alloy Full Load Current 6.4 to 6.82 A 6.44 to 6.79 A 6.71 to 7.18 A 6.8 to 7.57 A 6.9 to 7 A 7.19 to 7.8 A 7.22 to 7.69 A 7.68 to 8.15 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