Eaton / Cutler-Hammer FDP325BR – 400A, 3-Pole Vertical Main Fusible Panel-Mount Switch – FDP Series

Meet the Eaton / Cutler-Hammer FDP325BR, a rugged 400A, 3-pole vertical main fusible panel-mount switch engineered for demanding switchboard and panelboard applications. As part of the FDP Series, it delivers dependable load isolation and precise overcurrent protection where uptime and safety matter most.

Designed for vertical installation, this device blends time-tested construction with modern Eaton reliability. It serves as a single, robust solution to disconnect power to three-phase feeders, safeguarding equipment and personnel during maintenance or fault conditions. The FDP325BR also carries a legacy lineage from the Westinghouse FDP line, offering familiarity and proven performance in legacy installations.

Key advantages

• 400A, 3-pole configuration— handles three-phase service with solid fault isolation and scalable protection for industrial workloads
• Panel-mount design— streamlined integration into switchboards and panelboards, with a compact footprint that optimizes cabinet space
• Fusible main switch— combines main isolation with overcurrent protection in one dependable device, enabling straightforward fuse replacement and maintenance
• Vertical installation— orientation chosen to simplify wiring runs, accessibility, and service procedures in enclosure layouts
• FDP Series heritage— compatibility and familiarity with existing FDP-based power protection schemes, including legacy Westinghouse systems

Practical use cases

• Industrial facilities requiring a reliable main disconnect for three-phase feeders within panelboards
• Manufacturing floors where rapid, safe power isolation is essential during maintenance
• Switchboards that benefit from a compact, vertical main switch to maximize cabinet organization and serviceability

Why choose the FDP325BR? It combines a high-current 400A rating with a proven vertical-mount, panel-ready form factor, delivering dependable protection and clean isolation in heavy-duty environments. The fusible design lets you tailor protection to your exact electrical protection strategy, supporting straightforward maintenance routines and minimized downtime.

Incorporate the FDP325BR into your electrical infrastructure to ensure robust, industry-grade protection for critical three-phase feeders, with a legacy-ready solution that accommodates both modern and older panelboard configurations.