Eaton / Cutler-Hammer FDP365BJ – 400A, 3-Pole Vertical Main Fusible Panel-Mount Switch – FDP Series

Engineered for demanding industrial environments, the Eaton / Cutler-Hammer FDP365BJ is a 400A, 3-pole vertical main fusible panel-mount switch from the FDP Series. Designed to deliver reliable load isolation and precise overcurrent protection, it’s the ideal choice for switchboard and panelboard applications that require robust, code-aware main switching in a vertical configuration.

Why operators choose the FDP365BJ:

• High-current, three-phase protection: 400A rating in a compact vertical form supports main isolation for large feeders in manufacturing, processing, and complex facilities.
• Vertical panel-mount versatility: Built for vertical installation, it integrates smoothly into standard panel layouts, enabling efficient routing and neater bus assemblies.
• Reliable fusible protection: As a fusible main switch, it provides fast fault interruption to protect downstream equipment, wiring, and connected loads.
• Series compatibility and legacy support: Part of the FDP Series with direct compatibility to existing FDP installations and legacy Westinghouse FDP vertical main switches for easier modernization or expansion.
• Industrial-duty construction: Designed for continuous operation in demanding environments, with proven performance in panelboards and switchboards.

Typical use cases:

• Primary main isolation in 3-phase switchboards and panelboards for factories, warehouses, and processing plants.
• Upgrading older FDP-based installations where a vertical, fusible main switch is required to restore or expand capacity.
• Applications that demand clear, manual disconnect with integrated protection to satisfy safety and reliability standards.

Key benefits you’ll notice in daily operation:

• Clear, positive isolation during maintenance, reducing downtime and exposure to live components.
• Targeted protection for feeders and downstream equipment, helping avoid unplanned outages in critical processes.
• Simple integration with existing FDP Series hardware, reducing complexity during replacements or upgrades.

Technical snapshot:

• Current rating: 400A
• Pole configuration: 3-pole
• Mounting: Vertical panel-mount
• Type: Main fusible switch, FDP Series
• Compatibility: FDP Series, legacy Westinghouse FDP vertical main switches