Last Chance Siemens E43B040 – 40A 3 Pole Molded Case Circuit Breaker

Built for heavy-duty power distribution, the Siemens E43B040 is a 40A, 3-pole molded case circuit breaker. It utilizes a fixed thermal-magnetic trip unit to safeguard commercial and industrial circuits. The bolt-on design ensures a secure connection within Siemens Sentron panelboards, SB switchboards, and older ITE F-Series enclosures. Delivering an 18 kAIC interrupt rating at 480VAC, this legacy E-Frame component is fully HACR rated and can be replaced by the newer ED43B040.