WMTB4020 Circuit Breaker by Eaton, Cutler Hammer or Westinghouse EATON CUTLER HAMMER CIRCUIT BREAKER 4 POLES 20 AMPS 240 VAC TYPE B CAT# WMTB4020 New Surplus Inventory Code: T Make an Offer Send to a Friend Type: B Voltage: 240 V Poles: 4 Frame Amperage: 20 A Mount: Plug-in WHSE Code: CB30B4 Return To Circuit Breakers