QO340 Circuit Breaker by Square D SQUARE D CIRCUIT BREAKER 3 POLES 40 AMPS 240 VAC TYPE QO CAT# QO340 Reconditioned New Surplus Inventory Code: A Make an Offer Send to a Friend Type: QO Voltage: 240 V Poles: 3 Frame Amperage: 40 A Mount: Plug-in WHSE Code: CB22B1 Return To Circuit Breakers