Westinghouse MC3800WK Molded Case Switch 3 Pole

The Westinghouse MC3800WK molded case switch is a 3-pole, 800-Amp manual disconnect designed for high-capacity three‑phase power in commercial and industrial electrical distribution systems. It features bolt-on mounting for panel installation and non-automatic switching, and is rated for 240–600 V AC, supporting switchgear and distribution equipment in facilities such as manufacturing plants, HVAC infrastructure, mining operations, and heavy machinery environments. This MC-series device is built for dependable circuit isolation and is commonly used in switchgear assemblies, motor control centers, and large power-distribution applications where safe, manual disconnection is critical. Common replacements include Eaton MC3800WK, Cutler-Hammer MC3800WK, and Square D ME36800NS.