Siemens E43B100 – 100A 3 Pole Molded Case Circuit Breaker Affordable

Built for industrial and commercial power systems, this 100A bolt-on circuit breaker offers robust thermal-magnetic protection. It installs seamlessly into Siemens Sentron panels, ITE F-Series panelboards, and SB switchboards. The three-pole unit features a 25 kAIC rating at 240VAC and 18 kAIC at 480VAC, ensuring safe operation during fault conditions. It includes factory-installed load lugs and supports reverse feeding. For new installations, this legacy frame is replaced by the ED43B100.