Square D DU-323 - 100A, Safety Switch

The Square D DU-323 100A Safety Switch provides a reliable, dedicated isolation point for industrial and commercial electrical systems. Built for daily operation, it supports strict lockout/tagout (LOTO) procedures and delivers dependable disconnection under load, helping maintenance teams work safely and efficiently.

Why the DU-323 stands out:

• 100 Amp capacity ensures you can isolate mid-range circuits in manufacturing lines, processing equipment, or service panels without compromise.
• Lockout/Tagout readiness—designed to work with standard LOTO practices so teams can securely prevent re-energization during service.
• Safe disconnection under load—the mechanism is built to provide immediate, reliable isolation when it’s needed most.
• Durability for demanding environments—engineered to withstand the rigors of both industrial and commercial settings, delivering long-term reliability.

Ideal use cases

• Isolating equipment on production lines, conveyors, and motor-driven systems
• Serving as a dedicated isolation point for service panels and electrical rooms
• Supporting maintenance and repair tasks that require a guaranteed de-energized state

Practical guidance for maximum value

• Pair the DU-323 with compatible lockout devices to ensure a secure, irreversible stop during service.
• Integrate it as a reliable isolation point where safety and quick disconnection are priorities, independent of other protection devices.
• Schedule routine inspections of the enclosure and mounting hardware to maintain long-term reliability.

With its straightforward 100A safety switch design, the DU-323 helps streamline safety procedures, minimize downtime, and protect personnel without sacrificing efficiency. Whether upgrading an existing system or equipping a new installation, this Square D safety switch delivers a practical, dependable solution for safe electrical isolation.