Westinghouse FDP365R Fusible Disconnect Switch

Westinghouse FDP365R is a 400A, 600V, three‑phase fusible disconnect switch configured as a panelboard‑mounted Fusible Panelboard Switch in the FDP series, designed for use in industrial electrical distributions where reliability and quick power isolation are essential. It provides manual power isolation and fused circuit protection for high‑amperage distribution equipment, backed by a 200 kA interrupt rating, enabling fast interruption of fault current with minimal arc exposure in panelboards, switchgear, MCCs, and other 50/60 Hz industrial power systems. Commonly used in motor control centers, HVAC infrastructure, conveyors, automation equipment, and industrial distribution panels, the FDP365R supports replacement, retrofit, or maintenance within existing electrical infrastructure and accepts industrial power fuses for precise protection, matching industry practices for fused protection in large‑capacity installations. Common replacements include Eaton FDP365R, Siemens HF365R, and Square D H365R, reflecting compatibility across major manufacturers for upgrading or refurbishing fuse‑switch assemblies.