Westinghouse Electric Corporation SPB-100-3P-800A Pow-R-Breaker

Westinghouse SPB-100-3P-800A Pow-R-Breaker is a 3-pole molded-case power circuit breaker designed for industrial three-phase power distribution, delivering reliable overcurrent and short-circuit protection. It features an 800 A frame rating and operates at 50/60 Hz, intended for switchgear or panel-mounted installations in industrial and commercial environments. Typical applications include switchgear, motor control centers (MCCs), and industrial panels where thermal-magnetic circuit protection guards feeders and equipment from overloads and faults. Common replacements for the SPB 100 include Eaton Power Defense, Siemens Sentron, and Square D PowerPact circuit breakers.