Eaton / Westinghouse FDPS365 - 400A, 600V, 3-Pole Panelboard Switch / Switchboard Unit | AmpState

Meet the Eaton / Westinghouse FDPS365, a purpose-built fusible panelboard switch engineered to take control of feeders in demanding lighting and distribution panel systems. Rated for 400 A at up to 600 V, this rugged 3-pole unit delivers reliable isolation when you need it most—during routine maintenance or fault events. Part of the trusted FDPS family, it combines industrial-grade strength with precise switching in space-constrained panelboards.

What makes the FDPS365 stand out

• Three-pole simultaneous isolation: Ensures all phases are disconnected at once, simplifying maintenance and enhancing safety in 3‑phase systems.
• Coordinated fusible protection: Provides feeder overcurrent protection that aligns with upstream fuse class requirements for dependable protection coordination.
• Rugged, industrial-grade construction: Built to endure the rigors of panelboard environments where reliability matters and space is at a premium.
• Integrated panelboard fit: Designed to plug cleanly into lighting and distribution panelboard architectures, reducing the need for extra components while preserving clear disconnection capability.

Ideal use scenarios

• Commercial and industrial lighting panelboards requiring fast, reliable feeder isolation.
• Distribution panelboards serving subcircuits and feeders that demand dependable 3‑phase switching and overcurrent protection.
• Maintenance‑friendly environments (electrical rooms, equipment rooms, service areas) where upstream fuse protection is coordinated with a fusible switch.

How it works and installation tips

To achieve proper protection, pair the FDPS365 with a correctly rated upstream protection device and a compatible fuse class. Verify that your panelboard enclosure and bus arrangement align with the unit’s 3-pole footprint and mounting requirements. Keep an on-hand stock of compatible fuses for rapid replacement, helping keep critical feeders online with minimal downtime.

Specifications at a glance

• Amperage: 400 A
• Voltage: 600 V
• Poles: 3
• Series: FDPS
• Part Number: FDPS365
• Manufacturer: Eaton / Cutler-Hammer (Westinghouse branding)
• Application: Fusible panelboard switch for lighting and distribution panelboards

Available through AmpState, the FDPS365 offers a dependable solution for precise feeder control and protection within lighting and distribution panelboard ecosystems. If you’re optimizing safety, reliability, and space in your electrical infrastructure, this 3‑pole fusible switch is a targeted, practical choice that addresses real-world maintenance and protection needs.