NGB3B050 Circuit Breaker by Siemens SIEMENS CIRCUIT BREAKER 3 POLE 50 AMP 277 VAC 50/60 HZ CAT # NGB3B050 New Surplus Inventory Code: B Make an Offer Send to a Friend Voltage: 277 V Poles: 3 Frame Amperage: 50 A Mount: Bolt-in WHSE Code: CB34E4 Return To Circuit Breakers