WMZS1B20 Circuit Breaker by Eaton, Cutler Hammer or Westinghouse EATON MINIATURE CIRCUIT BREAKER 20 AMPS 1 POLE 400 VAC CAT# WMZS1B20 Make an Offer Send to a Friend Voltage: 400 V Poles: 1 Frame Amperage: 20 A Mount: Plug-in Return To Circuit Breakers