Westinghouse DK3400W Molded Case Circuit Breaker

The Westinghouse DK3400W Molded Case Circuit Breaker provides a 400 A frame with a 300 A trip rating on a 240 V three-phase system, housed in the rugged DK-Series K-Frame for industrial power distribution and motor control protection. It is designed for panelboard installation in industrial facilities, motor control centers, manufacturing equipment, and other three-phase distribution applications where reliable overload and short-circuit interruption is essential. Equipped with a thermal-magnetic trip unit, this 3-pole device safeguards three-phase circuits and supports interrupt ratings up to 65 kA at 240 VAC depending on configuration. For upgrades or replacements in industrial power systems, it is commonly replaced by Eaton DK Series, Siemens Industrial, and Square D PowerPact breakers.