HFB1020 Circuit Breaker by Eaton, Cutler Hammer or Westinghouse WESTINGHOUSE MARK 75 AB DE-ION CIRCUIT BREAKER TYPE HFB CAT# HFB1020 STYLE# 4976D04G03 20 AMPS 1 POLE 277 VAC Reconditioned Inventory Code: Z+ Make an Offer Send to a Friend Voltage: 277 V Poles: 1 Frame Amperage: 20 A WHSE Code: L6J6 Return To Circuit Breakers