Westinghouse FDB3150 Molded Case Circuit Breaker

The Westinghouse FDB3150 is a 150 Amp, 600 Volt three‑pole molded case circuit breaker built for industrial electrical distribution and branch circuit protection. Designed for high‑capacity three‑phase overcurrent protection, it is commonly installed in motor control centers, switchboards, industrial automation panels, and manufacturing equipment requiring robust protection for connected power systems. This device belongs to the Westinghouse FDB frame and utilizes a thermal‑magnetic trip mechanism to provide reliable overcurrent and short‑circuit protection, with mounting suitable for panel or switchboard installations and support for 50/60 Hz operation. It serves as essential branch circuit and equipment protection in power distribution and motor control systems across industrial and commercial environments. Common replacements include Eaton FDB3150, Siemens HFD3150, and Square D FA34150.