Square D DU322 - Fused Disconnect Switch

The Square D DU322 Fused Disconnect Switch is engineered for dependable electrical isolation in demanding industrial and commercial settings. Designed to support safe lockout and tagout procedures, this disconnect switch delivers reliable disconnection under load, helping maintenance teams work confidently and equipment stay protected over the long term.

Overview

As a dedicated fused disconnect solution, the DU322 combines robust electrical isolation with built‑in overcurrent protection. Its solid construction and proven performance make it a trusted choice for service entrances, control panels, and motor circuits where uptime and safety are paramount.

Why the Square D DU322 Stands Out

• Reliable isolation with fuse protection: The fused design provides immediate interruption of fault currents, helping prevent damage to equipment and wiring while enabling a clear, safe disconnect during maintenance.
• Supports lockout/tagout (LOTO): Built to integrate with standard LOTO practices, the DU322 helps facilities stay compliant during servicing, reducing risk for workers and downtime for operations.
• Disconnection under load: Engineered to safely interrupt circuits even when there is load present, enhancing safety during equipment servicing and line changes.
• Durable in harsh environments: Built for long‑term reliability in industrial and commercial environments, delivering steady performance in daily operation and during fault conditions.
• Brand you can trust: Square D is a recognized name in electrical safety and control solutions, backed by a history of quality and support.

Key Features and Benefits

• Industrial-grade construction: Designed to withstand the rigors of busy facilities, reducing replacement costs and maintenance interruptions.
• Clear isolation point: Provides a definitive disconnect for safety during maintenance, inspections, and panel work.
• Compatibility with control panels and feeders: Ideal for use as a main or sectional disconnect where precise shutdowns are required.
• Simple integration into existing systems: Works with standard electrical layouts and common lockout devices to streamline safety procedures.

Ideal Use Cases

• Maintenance shutdowns on manufacturing lines, conveyors, and robotics where quick, safe isolation is essential.
• Electrical panel service and upgrades that require a reliable disconnect with overcurrent protection.
• Motor control centers and feeder circuits where a fused disconnect adds a layer of protection and controllability.
• Facilities that prioritize strict lockout/tagout compliance for worker safety during servicing.

Practical Guidance

For best results, pair the DU322 with appropriate fusing accessories and lockout equipment, and follow established safety protocols for electrical work. Regularly inspect the switch for signs of wear, verify fuse integrity, and ensure that lockout devices remain securely engaged during maintenance windows.

Specifications at a Glance

• Product Type: Fused Disconnect Switch
• Brand: Square D
• Model: DU322

Choose the Square D DU322 when you need a dependable fused disconnect that prioritizes safety, supports lockout/tagout procedures, and delivers trustworthy disconnection under load. It’s a practical, durable solution for improving maintenance safety, protecting equipment, and keeping your operations running smoothly.