Westinghouse SPB100-250-LSIG Air Circuit Breaker

The Westinghouse SPB100-250-LSIG Air Circuit Breaker provides LSIG protection for high-capacity industrial power distribution in a 250 A frame with a 3-pole configuration and a 200 A trip unit. As part of Westinghouse's Pow-R-Breaker line, it delivers long-time, short-time, instantaneous, and ground-fault protection to guard equipment from overloads and short circuits. Designed for installation in switchgear or panel-mounted assemblies, it operates at 50/60 Hz and is built for industrial and commercial environments. Typical applications include switchgear, motor control centers, and industrial distribution systems in manufacturing plants, where dependable high-current protection supports continuous operation and equipment safety. Common replacements listed for this breaker include Eaton Magnum DS, Siemens WL, and Square D Masterpact, reflecting its role in established industrial protection ecosystems.