Square D DU323RB 100A 3P 240V Safety Switch, NEMA 3R, Fusible, Non-Fusible | AmpState

Designed for dependable equipment shutdown at the point of use, the Square D DU323RB is a 100 A, 3-pole, 240 V safety switch that blends rugged protection with flexible deployment. Built to isolate power safely, it serves as a reliable disconnect for motors, pumps, conveyors, and other demanding industrial equipment.

With a NEMA 3R rating, the DU323RB is rugged enough for outdoor installations and exposed environments, delivering dependable performance regardless of weather or incidental contamination. The enclosure is purpose-built to maintain safe operation in harsh conditions, giving you peace of mind on maintenance days and during routine operation.

Key differentiators and benefits

• Fusible or Non-Fusible configurations: Adapt the switch to your protection strategy without changing the hardware footprint. This flexibility helps you align with your existing electrical design and spare-part strategy.
• Three-pole, 100 A at 240 V: A compact yet capable disconnect option that integrates smoothly into control circuits and power distribution layouts.
• NEMA 3R enclosure: Weather-resistant protection suitable for outdoor use and challenging environments, reducing the need for additional enclosures.
• Part number consistency for retrofit projects: Ideal when you need to keep the same part number for maintenance planning, inventory management, or long-term service compatibility.
• Point-of-use isolation: Enables safe servicing and maintenance workflows by providing a clear, local disconnect at the equipment site.
• AmpState availability: Purchase and support through AmpState, with assistance available to confirm fit and compatibility for your specific installation.

Use cases and ideal applicants: This safety switch is well-suited for retrofit projects where you must preserve the existing part number, as well as new installations needing a reliable at-site disconnect for three-phase equipment. It’s a practical choice for outdoor motors, pumps, HVAC systems, and heavy machinery that require durable isolation and straightforward maintenance planning.

If you’re unsure about fit, AmpState can help verify compatibility and ensure the DU323RB aligns with your panel or system configuration, keeping your project on schedule. Elevate your equipment safety and maintenance efficiency with a trusted Square D solution engineered for real-world industrial use.