Best Choice Siemens E43B045 – 45A 3 Pole Molded Case Circuit Breaker

Engineered for commercial applications, the Siemens E43B045 delivers robust overcurrent protection. This 3-pole, 45A molded case circuit breaker features a fixed thermal-magnetic trip unit and is HACR rated. The bolt-on design mounts into Siemens Sentron P1, P2, and P3 panelboards, F2 panelboards, and SB switchboards. It serves as a replacement for older E-frame units and is superseded by the ED43B045. With an 18 kAIC rating at 480VAC, it handles demanding electrical distribution tasks.