Westinghouse Electric Corporation KA3150 Circuit Breaker

The Westinghouse KA3150 Circuit Breaker is a three-pole molded-case device rated for 150 A at up to 600 V AC, designed to provide overcurrent and short-circuit protection for three‑phase power circuits in industrial and commercial distributions. As part of the KA series, this thermal-magnetic breaker installs in panel-mounted configurations and is commonly used in switchgear assemblies, panelboards, motor control centers, and industrial electrical panels where reliable interruption of fault currents is required. Maintenance teams, electricians, and facility operators rely on the KA3150 for replacement of aging protection devices, electrical system upgrades, and preventative maintenance of power distribution infrastructure. Applications span manufacturing facilities, commercial buildings, HVAC systems, and industrial automation equipment, where dependable three‑phase protection is critical for safe, continuous operation. Technical notes: Molded-case construction and three poles support efficient fault interruption and protection for branch circuits and equipment. Compatible with switchgear and distribution systems, the KA3150 is suited for commercial and industrial electrical protection systems. Common replacements include Eaton KA3125, Cutler-Hammer KA3125, and Square D KA36125.