Square D DU323 - 100A, 3-Pole, Fused Disconnect Switch

The Square D DU323 100A 3-Pole Fused Disconnect Switch is built for serious industrial and commercial environments where reliable electrical isolation is non-negotiable. This 3-pole, fused disconnect delivers dependable disconnection under load, helping teams perform lockout/tagout procedures safely and efficiently while protecting downstream equipment and personnel. Why the DU323 stands out - Purpose-built for secure isolation: The fused design provides distinct overcurrent protection, interrupting fault energy to minimize arc potential and safeguard circuits during maintenance or emergencies. - Ready for lockout/tagout: Engineered to work seamlessly with standard lockout devices and safety tags, making compliant servicing quick and straightforward. - Rugged indoor-ready enclosure: NEMA 1 enclosure construction shields internal components from dust, debris, and incidental moisture in indoor facilities, enhancing long-term durability. - Clear, reliable switching under load: Designed to disconnect powered circuits without hesitation, reducing downtime and enabling safer servicing windows. - Brand you can trust: Square D’s DU323 line combines proven electrical performance with the reliability expected in critical infrastructure applications. What problems it solves - Reduces risk during maintenance: With reliable under-load disconnection and easy lockout/tagout compatibility, technicians can isolate circuits confidently without guesswork. - Improves downtime planning: A dedicated fused disconnect streamlines fault isolation, enabling faster restoration and safer, more predictable repair workflows. - Enhances safety in demanding spaces: The robust, enclosed design protects the switching components and minimizes exposure to energized parts during operation and maintenance. Ideal use cases - Motor control centers and machine feeders requiring a robust, code-aligned isolation switch. - Service disconnects for commercial or light industrial equipment where dependable under-load interruption is essential. - Electrical rooms and substations needing a compact, wall-mount or cabinet-manel configuration with secure access. Specifications at a glance - Amperage rating: 100 A - Number of poles: 3-Pole - Enclosure: NEMA 1 - Type: Fused Disconnect Switch - Brand: Square D - Model: DU323 Practical considerations and tips - Pair with appropriate fuse elements specified for your load profile to ensure optimal protection and fault response. - Use compliant lockout/tagout practices with compatible padlocks and safety tags for maintenance windows. - Verify enclosure mounting and wiring clearances per your facility’s electrical code and local regulations to maintain safe operation and ease of service. The DU323 is more than a switch—it's a dedicated solution for safe, reliable electrical isolation that keeps industrial operations running smoothly. Designed for technicians who demand precise control, durable construction, and straightforward compliance, this fused disconnect helps you protect people, protect equipment, and protect your schedule.