Eaton / Cutler-Hammer FDP325TR – 400A, 3-Pole Vertical Main Fusible Panel-Mount Switch – FDP Series

Eaton / Cutler-Hammer FDP325TR is a 400A, 3-pole vertical main fusible panel-mount switch from the FDP Series, engineered for reliable load isolation and overcurrent protection in switchboard and panelboard installations.

Designed for vertical installation, this fusible main switch fits neatly inside standard panels, serving as the primary disconnect to safeguard equipment and personnel during maintenance or fault conditions. With its fusible construction, it provides robust current interruption through replaceable fuses, delivering predictable protection where it matters most.

As a legacy Westinghouse FDP vertical main switch, the FDP325TR preserves a familiar form factor and proven performance. This heritage simplifies replacements and retrofits in older installations while aligning with Eaton’s modern standards for reliability and serviceability.

Key benefits and ideal use cases

• 400A, 3-pole main disconnect—provides strong, centralized overcurrent protection for distributed electrical systems.
• Vertical panel-mount configuration—optimizes panel space and enables straightforward integration into existing switchboards and panelboards.
• Fusible protection—interrupts fault currents quickly through compatible fuses, simplifying maintenance and fuse replacement routines.
• Industrial-duty reliability—designed for demanding environments found in manufacturing, facilities, and large electrical rooms.
• Legacy compatibility—the Westinghouse FDP lineage supports smoother retrofits and part compatibility with established installations.

Who should consider the FDP325TR? Electrical engineers, plant maintenance teams, and facilities managers looking for a robust, space-conscious main isolation switch for switchboard and panelboard applications. It’s well-suited for new projects needing a dependable 400A main disconnect, as well as retrofits where legacy FDP components are present and continuity matters.

Practical insights:

• Plan for compatible fuses as part of the maintenance lifecycle; stock common fuse types used with FDP Series devices to minimize downtime.
• Verify panel dimensions and clearance to ensure clean vertical mounting and accessible front-end operation during maintenance.
• Coordinate with enclosure ratings and electrical room standards to ensure compliant installation and safe service access.

With the FDP325TR, you gain a compact, vertically mounted main switch that delivers clear isolation, straightforward maintenance, and a trusted legacy, all within Eaton’s FDP Series framework designed for long-term reliability in demanding industrial environments.