Westinghouse FB1030 Molded Case Circuit Breaker

The Westinghouse FB1030 is a 30 Amp, 1-pole molded case circuit breaker designed for industrial power distribution and branch-circuit protection. It provides overcurrent and short-circuit protection for AC circuits up to 350 VAC and DC circuits up to 125 VDC, and is panel-mounted for easy installation in control panels, switchboards, machinery, and DC power systems. The device uses a thermal-magnetic trip mechanism and is rated for ambient temperatures up to 40°C, suitable for 50/60 Hz systems. Typical applications include control panels, automation systems, DC power supplies, machinery controls, lighting circuits, and other industrial distribution equipment requiring single-pole protection in both AC and DC circuits. For retrofit or replacement projects, common equivalents include Eaton FB1030, Siemens BQ1B030, and Square D QOB130.