Eaton / Cutler-Hammer FDP366BR – 600A, 3-Pole Vertical Main Fusible Panel-Mount Switch – FDP Series

Eaton / Cutler-Hammer FDP366BR is a 600A, 3-Pole Vertical Main Fusible Panel-Mount Switch from the FDP Series, engineered for industrial switchboards and panelboards requiring dependable load isolation and overcurrent protection. With its vertical installation design and proven FDP lineage, this device delivers a robust, single-source solution for critical power distribution applications.

• provides strong protection for three-phase feeder circuits, helping prevent outages and equipment damage in demanding industrial environments.
• Vertical panel-mount design aligns with standard enclosures, simplifying installation and wiring in compact switchgear layouts.
• Main fusible functionality combines disconnect capability with overcurrent protection in one unit, enabling rapid isolation of the load and streamlined maintenance procedures.
• Industrial-duty construction built to withstand the rigors of panelboards and switchboards where reliability is critical.
• Legacy Westinghouse FDP lineage offers proven compatibility and a familiar replacement path for existing FDP vertical main switches, reducing retrofit complexity.

Ideal applications and use cases

The FDP366BR is well suited for industrial facilities, manufacturing lines, and large commercial buildings that rely on a reliable main isolation device with built-in protection. It serves as the primary service disconnect in switchboards and panelboards, providing a clear, certified path to isolate power for maintenance while maintaining strong overcurrent protection for downstream equipment. Its three-pole design ensures balanced protection across all phases, which is essential for any three-phase distribution system.

Why this FDP series solution stands out

Choosing the FDP366BR means opting for a purpose-built main fusible switch that is designed to fit standard vertical installations and panelboard configurations. The 600A rating reduces the number of devices needed for large feeders and simplifies wiring runs, while the 3-pole arrangement ensures synchronized operation across phases. The FDP Series from Eaton / Cutler-Hammer delivers predictable performance, backed by a heritage of FDP-based installations in legacy systems, making it a reliable choice when modernizing or expanding power distribution infrastructure.

Key specifications at a glance

• FDP366BR
• 600A
• 3
• Panel-Mount, Vertical
• FDP
• Main Fusible Switch

For projects requiring a solid, space-efficient main isolation device with built-in protection, the FDP366BR from Eaton / Cutler-Hammer offers a precise, field-proven solution that aligns with traditional FDP installations while meeting the demands of modern switchboard and panelboard designs.