Cutler-Hammer DH364UD - 200A, 600V, Safety Switch, NEMA 1

Meet the Cutler-Hammer DH364UD, a rugged 200A, 600V safety switch engineered for dependable on/off isolation and precise overcurrent protection in demanding industrial and commercial environments.

With a NEMA 1 enclosure, this indoor-rated safety switch is purpose-built for motor disconnects, panelboards, and branch circuits where a compact, maintainable fusible switch is required. It delivers a reliable combination of isolation and protection in a footprint that fits tight control rooms, equipment cabinets, and retrofit projects without compromising safety or performance.

Key advantages that matter in real-world installations

• 200A current rating at up to 600V — robust protection for motor loads, feeders, and critical branch circuits.
• NEMA 1 enclosure — suitable for indoor, dry environments where protection from dust and incidental contact is needed.
• Fusible safety switch design — integrates overcurrent protection with isolation for streamlined electrical protection in a single device.
• Maintenance-friendly configuration — designed for straightforward fuse replacement and wiring access, reducing downtime during service and inspections.
• Versatile for control panels and motor circuits — ideal when a dedicated disconnect is required for panelboards or branch circuits in both new builds and retrofits.

Who benefits most? Electrical engineers, control panel integrators, and maintenance teams who need a reliable, code-compliant disconnect that fits in compact spaces. Facilities managers and industrial technicians will appreciate the simplicity of installation and the ease of routine servicing without sacrificing protection or performance.

Practical considerations and best-use guidance: ensure the DH364UD is paired with appropriately rated fuses and wired according to your NEC-compliant protection scheme. Use it as the primary means of disconnect for motors and critical branch circuits, and incorporate standard lockout/tagout practices during maintenance to maximize safety and uptime.

Compared to larger, more complex disconnect assemblies, the DH364UD offers a focused, dependable solution that combines isolation and overcurrent protection in a single, compact package. It’s the right choice when you need a durable, indoor-only safety switch that helps you protect personnel, equipment, and production processes without sacrificing space or serviceability.