Final Sale Siemens B145 – 45A 1 Pole Molded Case Circuit Breaker

Built for commercial and industrial applications, the Siemens B145 provides reliable thermal-magnetic overcurrent protection. This 45-amp, single-pole molded case circuit breaker delivers a standard 10kAIC interrupting rating at 120/240VAC. Designed for seamless integration, it installs into Siemens P1, P2, P3, P4, and P5 panelboards via a sturdy bolt-on connection. The HACR-rated unit features a trip-free mechanism, non-interchangeable trip unit, and supports reverse feed configurations.