Westinghouse JA31250MW 3-Pole Circuit Breaker

The Westinghouse JA31250MW is a 3-pole molded-case circuit breaker rated for 125 amps and 600 V AC, providing overcurrent and short-circuit protection for three-phase power circuits. With a thermal-magnetic trip and panel-mounted installation, it is commonly used in panelboards, switchgear assemblies, motor control centers, and industrial electrical panels within commercial and industrial distribution systems. This JA-series breaker supports branch circuit and equipment protection for manufacturing facilities, commercial buildings, HVAC systems, industrial automation equipment, and motor control applications where reliable 125 A three-phase circuit protection is required. Common replacements include Eaton JA3125, Cutler-Hammer JA3125, and Square D KA36125.