Westinghouse QC3020 Industrial Circuit Breaker

The Westinghouse QC3020 Industrial Circuit Breaker is a 3-pole, 20 Amp, 240V thermal-magnetic device in the Quicklag series, designed for rapid overload and short-circuit interruption. Built for panel-mounted use in industrial and commercial power distribution systems, it provides dependable branch circuit protection and load management across panelboards, motor control equipment, and industrial machinery. It operates in a 3-phase configuration with a 10 kA interrupt rating, using a thermal-magnetic trip to respond to overloads and faults. The manufacturer part number is QC3020, reflecting its Quicklag family positioning for reliable electrical protection in commercial and industrial facilities. Common replacements include Eaton QC3020 Quicklag, Square D QOB320, and Siemens BQ3B020 circuit breakers.