MF3-KLS-400 Circuit Breaker by Copper Logic COPPER LOGIC CIRCUIT BREAKER 3 POLE 400 AMP 600 VAC CAT # MF3-KLS-400 New Surplus Inventory Code: B Make an Offer Send to a Friend Voltage: 600 V Poles: 3 Frame Amperage: 400 A Mount: Bolt-in WHSE Code: CB33C1 Return To Circuit Breakers