Square D DU322 60A 3P 240V Safety Switch, NEMA 1, Fusible, Non-Fusible | AmpState

The Square D DU322 is a rugged, 60 A, three-pole safety switch designed for reliable equipment disconnect and isolation exactly where you need it. Whether you’re replacing a worn unit or stocking spares to keep your BOM aligned with the original part number, this switch delivers a clean, code-friendly solution for everyday electrical work. Available in both fusible and non-fusible configurations, it supports your protection strategy while simplifying maintenance in busy industrial environments.

Key features & technical details

• Amperage: 60 A
• Poles: 3 (three-phase)
• Voltage: 240 V
• Enclosure: NEMA 1 (indoor, dry environments)
• Configurations: Fusible or Non-Fusible to match your safety and protection scheme
• Brand & compatibility: Square D lineage, designed to integrate with standard control panels and existing Square D/Schneider ecosystems

Why this safety switch matters to your operation

In manufacturing lines, machine rooms, and service panels, a dependable disconnect is essential for safe maintenance and rapid downtime recovery. The DU322’s three-pole design ensures all three hot conductors disconnect simultaneously, reducing the risk of partial energization and simplifying lockout/tagout procedures. The NEMA 1 indoor enclosure keeps dust and incidental contact at bay in dry indoor settings, helping you maintain performance over the long term.

Fusible vs Non-Fusible — choosing the right configuration

Use the fusible version when you want integrated overcurrent protection in a single unit, aligning protection coordination with upstream fuses or breakers. If you already have a separate protection scheme or require a pure disconnect, the non-fusible configuration provides a straightforward, code-compliant isolation switch. Either way, the DU322 anchors your safety strategy with a proven, field-proven design.

Who benefits from the DU322

Great for maintenance teams, panel builders, and warehouse floor technicians who need a dependable, stock-ready part that matches the original BOM. It’s ideal for replacing failing switches on 3-phase 240 V equipment, adding a dedicated point-of-use disconnect to new or refurbished lines, and keeping critical spares on hand to minimize downtime.

Support and compatibility

AmpState stocks the Square D DU322, helping you keep consistency with the original part number. If you’re unsure about fit or need to confirm compatibility with your existing panels, reach out—we’ll help verify a precise match and ensure a smooth replacement process.