Westinghouse DK3300X Molded Case Circuit Breaker

The Westinghouse DK3300X Molded Case Circuit Breaker is a 300 Amp, 240 Volt, 3-pole unit built for industrial three-phase power distribution. Providing thermal-magnetic overload and short-circuit protection, it is designed for continuous industrial operation and intended for panelboard installation in industrial electrical systems. Typically deployed in motor control centers, manufacturing equipment, HVAC electrical systems, conveyors, and other three-phase distribution panels, the DK3300X protects three-phase branch and feeder circuits. Common replacements include Eaton DK Series Circuit Breaker, Siemens Industrial Circuit Breaker, and Square D PowerPact Circuit Breaker, underscoring its compatibility with mainstream industrial power distribution equipment.