Eaton / Cutler-Hammer FDPW325 – 400A, 240V, 3-Pole Panel-Mount Switch – 200kAIC FDP Series

Meet the Eaton / Cutler-Hammer FDPW325, a robust 400A, 240V, 3-pole panel-mount disconnect switch built for demanding industrial and commercial power systems. Part of the trusted FDP series, this switch delivers fast, safe isolation and dependable overcurrent protection, making it a cornerstone for reliable distribution in panelboards, switchboards, and distribution assemblies.

Powerful protection for critical systems

• 400A continuous rating for medium-to-large power distribution
• 240V AC operation tailored for three-phase circuits
• Three-pole design ensures balanced load management across all phases
• 200kA interrupting capacity (AIC) at 240V for superior fault protection
• Heavy-duty industrial-grade construction designed to endure harsh environments
• Panel-mount configuration guarantees secure installation and stable operation
• Interoperability with Eaton, Westinghouse, and Cutler-Hammer FDP panelboards and switchgear

Practically, the FDPW325 enables rapid, clean disconnection during faults, protecting feeders, motors, and downstream equipment while minimizing downtime. The 200kAIC rating provides a generous safety margin for high-short-circuit scenarios, and the 3-pole design ensures coordinated protection across all phases in a three-phase system.

Ideal use cases

Designed for panelboards, switchboards, and distribution assemblies in industrial facilities and commercial operations, the FDPW325 excels as a primary feeder disconnect, a sectionalizing switch in a distribution bay, or a critical isolation point in power distribution networks. It is well-suited for applications requiring reliable main-disconnect capability and compatibility with existing FDP-based architectures.

Why the FDP series stands out

The FDP series is engineered for longevity in tough settings—resistant to vibration, dust, and thermal cycling while delivering consistent performance. Its cross-compatibility across Eaton, Westinghouse, and Cutler-Hammer FDP systems simplifies upgrades and spare-part management, reducing downtime during maintenance or expansion projects.

Technical snapshot

• Brand/Manufacturer: Eaton / Cutler-Hammer / Westinghouse
• Series: FDP
• Part Number: FDPW325
• Product Type: Panel-Mount Disconnect Switch
• Amp Rating: 400A
• Voltage Rating: 240V AC
• Poles: 3
• Interrupting Capacity (AIC): 200kA @ 240V
• Applications: Power distribution, disconnecting, overcurrent protection
• Construction: Heavy-duty industrial-grade design
• Compatibility: Eaton, Westinghouse, and Cutler-Hammer FDP panelboard and switchgear systems

Practical tips for installation and operation

Plan around a 400A continuous-duty rating and 240V system. Connect correctly across all three poles to maintain balanced loads and optimal protection coordination. During maintenance, verify secure mounting, clean and tight terminations, and clear labeling to ensure safe isolation. If replacing existing FDP components, the FDPW325 integrates smoothly with current FDP configurations, preserving protection schemes and system reliability.