Square D DU323 - 100A, 3-Pole, Non-Fusible Safety Switch

Meet the Square D DU323 — a 100A, 3-Pole Non-Fusible Safety Switch built to deliver dependable electrical isolation in demanding industrial and commercial environments. When safety and uptime matter, this switch provides a clean, immediate disconnect under load while supporting rigorous lockout/tagout procedures.

Why choose the DU323? It’s engineered to combine straightforward reliability with practical, real-world safety features. This non-fusible design means there are no fuse links to monitor or replace, enabling maintenance teams to isolate circuits quickly and confidently without additional fuse handling steps. The rugged construction is purposefully durable for continuous operation, so you spend less time troubleshooting and more time keeping production lines moving.

Key features and benefits

• 100 Amp, 3-Pole configuration: Ideal for three-phase electrical distributions, delivering robust isolation for medium-sized industrial loads.
• Non-Fusible safety switch: Provides a dependable disconnect point without fuse maintenance, simplifying routine servicing and reducing spare parts needs.
• NEMA 1 enclosure: Indoor, general-purpose protection against dust and incidental contact, suitable for controlled environments such as electrical rooms and equipment spaces.
• Lockout/Tagout compatibility: Supports safe, compliant maintenance practices, helping you meet safety standards and minimize downtime during service.
• Durable long-term performance: Built to withstand frequent cycling and harsh industrial use, offering consistent disconnection reliability over time.

Ideal applications

• Industrial facilities and manufacturing floors needing reliable isolation for motors, conveyors, pumps, and service lines.
• Commercial mechanical rooms or equipment enclosures where safe power shutdown is required for maintenance.
• Electrical distribution points that demand a straightforward, maintenance-friendly disconnect without fuse handling.

Practical considerations and differentiation

Compared to fusible switches, the Square D DU323 emphasizes rapid, maintenance-friendly disconnection with a focus on safety and procedure compliance. It’s particularly well-suited for facilities prioritizing clean lockout/tagout workflows and steady, predictable performance in indoor settings. With its 3-pole design, it efficiently serves three-phase systems, while the NEMA 1 enclosure keeps installation simple in controlled environments.

Specifications at a glance

• Amperage Rating: 100A
• Number of Poles: 3-Pole
• Enclosure Rating: NEMA 1
• Product Type: Non-Fusible Safety Switch
• Brand: Square D
• Model: DU323

Tips for optimal use

• Pair the DU323 with appropriate lockout devices and visible-tags to maximize safety during maintenance.
• Plan installation in a clean, dry indoor space to maintain the NEMA 1 enclosure’s protective performance.
• Ensure your system is a suitable three-phase setup to leverage the full benefits of the 3-pole configuration.

Upgrade your electrical safety with the Square D DU323 — a dependable, industry-proven solution for safe isolation, compliant maintenance, and durable, long-term service. Add to cart today to empower safer operations across your facilities.