Eaton / Westinghouse FDPS366 - 600A, 600V, 3-Pole Panelboard Switch / Switchboard Unit | AmpState

The Eaton / Westinghouse FDPS366 is a 3-pole fusible panelboard switch engineered for dependable load switching and precise overcurrent protection within lighting and distribution panelboards. Designed to plug into the Eaton panelboard ecosystem, this unit pairs with the right upstream protection and fuse class to deliver safe, coordinated power control in a compact, rugged package.

With a rating of 600 A at 600 V and a 3-pole design, the FDPS366 enables robust control of substantial three-phase circuits. It provides deliberate isolation of three-phase feeds while its fusible element adds an essential layer of overcurrent protection, helping to safeguard equipment and maintain system reliability during maintenance or fault conditions.

Part of the FDPS series, this switch is built for easy integration with standard upstream devices and the broader Eaton panelboard ecosystem. It’s a practical choice for commercial, industrial, and service-entry applications where clear isolation, reliable protection, and straightforward control are priorities.

Key benefits that set the FDPS366 apart

• Deliberate three-phase isolation for safe maintenance and fault-avoidance on large distribution paths.
• Integrated fusible switching provides coordinated overcurrent protection when used with the appropriate fuse class, enhancing overall system safety.
• Selective coordination reduces fault energy and helps keep other circuits powered during a fault or maintenance window.
• Rugged, easy-to-integrate design that aligns with Eaton’s panelboard ecosystem and standard upstream devices.
• Versatile deployment suitable for retrofit projects or new installations in commercial facilities, healthcare environments, offices, retail spaces, and industrial settings with substantial three-phase loads.

Ideal use scenarios

• Retrofits or upgrades in existing panelboards needing a dedicated fusible switch for safer, more controllable distribution.
• New installations in offices, shopping centers, or healthcare facilities where dependable isolation and protection are essential.
• Industrial environments with large three-phase loads that require balanced switching and dependable distribution-level protection.

Specifications at a glance

• Amperage: 600 A
• Voltage: 600 V
• Poles: 3
• Manufacturer: Eaton / Cutler-Hammer
• Part Number: FDPS366
• Series: FDPS
• Application: Panelboard switches for lighting and distribution panelboards

When paired with the appropriate upstream protection and fuse class, the FDPS366 delivers reliable, coordinated power control that contributes to safer maintenance, improved fault management, and better long-term reliability of your electrical distribution system. This is the fusible panelboard switch you turn to when you need decisive isolation, robust protection, and clear, maintainable three-phase control.