Order Now Siemens NGB2B040B – 40A 2 Pole Molded Case Circuit Breaker

Built for industrial power distribution, this 40A Siemens molded case circuit breaker delivers robust thermal-magnetic protection. It operates across 600Y/347VAC and 125/250VDC systems to safeguard critical commercial infrastructure. The bolt-on design installs into Siemens P1, P2, and P3 panelboards. When replacing this NGB frame, the newer 3VA51 series serves as a substitute but requires a mounting strap kit. This breaker features a 100kAIC rating at 240V and includes load side lugs.