Square D HU365 400A 3P 600V Safety Switch, NEMA 1, Fusible, Non-Fusible | AmpState

The Square D HU365 safety switch is your dependable point‑of‑use disconnect for demanding industrial applications. Engineered for fast, responsible isolation, this 400 A, 3‑pole switch delivers robust protection and quick serviceability in a compact NEMA 1 enclosure.

Key benefits at a glance

• Electrical rating: 400 A, 3 poles, 600 V—designed to handle demanding motor loads and equipment circuits with confidence.
• Enclosure: NEMA 1 rated, ideal for indoor control panels and clean, dry environments where protection of the switch internals matters.
• Configurable protection: Fusible or Non‑Fusible options available on the same HU365 platform, giving you flexible protection strategies without changing hardware.
• OEM fidelity: Keeps your BOM aligned to the original part number, simplifying spare stocking and procurement during maintenance or upgrades.
• Trusted source: Available from AmpState, with support to verify fit and compatibility for your exact installation.

Why this matters for your operation

When you need a reliable equipment disconnect at the point of use, the HU365 delivers precise isolation to protect personnel during service and to safeguard downstream equipment. The ability to choose between fusible and non‑fusible configurations lets you align protection with your existing electrical design, codes, and safety procedures—without buying a different enclosure or control device.

Ideal use cases

• Motor control centers and other large‑load circuits where a dedicated disconnect is required for maintenance lockout/tagout.
• Replacement projects that must preserve original part numbers for BOM consistency and quick cross‑reference.
• Spare inventory to ensure fast field repairs and minimal downtime when a control switch is needed.
• Indoor panel installations in manufacturing, packaging, and process environments where a sturdy, space‑efficient safety switch is beneficial.

How it compares to alternatives

Compared with generic disconnect switches, the HU365 offers a precise balance of high current capability, a reliable NEMA 1 enclosure, and the flexibility of fusible/non‑fusible configurations. This combination supports safer maintenance procedures, easier part validation against legacy systems, and smoother stocking practices for original equipment configurations.

Practical tips for getting the most from your HU365

• Match the fusible or non‑fusible configuration to your circuit protection strategy to ensure correct coordination with upstream devices.
• Use the BOM alignment advantage when planning replacements or spares to minimize procurement friction and part substitutions.
• Leverage AmpState support to confirm fit with your equipment and cross‑reference to any legacy part numbers you maintain on file.

Need help confirming compatibility or locating the exact part number for your setup? Message us and we’ll help you confirm fit and ensure a seamless installation.