Square D D323NBR - 100A, 240V, Fused Safety Switch

The Square D D323NBR 100A, 240V Fused Safety Switch is engineered for industrial and commercial environments where safe, reliable electrical isolation is non-negotiable. This fused disconnect combines robust current protection with a clear, lockable path to de-energize equipment, supporting safe maintenance, servicing, and emergency shutdowns.

• 100 A amperage rating paired with a 240 V voltage rating makes it a precise fit for mid- to high-capacity circuits in industrial spaces.
• Fused protection provides dependable overload and fault-current protection right at the disconnect point, helping to shield wiring and downstream equipment.
• Safe electrical isolation facilitates safer service workflows by delivering a definitive disconnect when needed, even in demanding operating conditions.
• Lockout/Tagout (LOTO) readiness designed to support proper lockout and tagout procedures, preventing re-energization during maintenance and ensuring worker safety.
• Durable, long-term reliability built to withstand the rigors of industrial environments, reducing maintenance downtime and replacement needs.
• Reliable disconnection under load engineered to perform consistently when switching or isolating circuits that are live, contributing to safer, more predictable shutdowns.

Use cases and ideal applications

Ideal for equipment rooms, manufacturing lines, and commercial spaces where heavy equipment requires a dedicated, fuse-protected isolation point. The Square D D323NBR is well-suited for control panels, service panels, and any application that benefits from a single, accessible disconnect that supports safe servicing and quick, compliant lockout/tagout procedures.

Why this model stands out

This fused safety switch delivers more than a simple on/off control. By integrating fusing with a robust disconnect, it provides immediate circuit protection and a clear de-energization point, streamlining electrical safety workflows. For teams prioritizing safety, reliability, and operational uptime, the D323NBR offers a concrete, purpose-built solution that aligns with everyday maintenance and emergency response needs.

Practical guidance for maximum value

To get the most from the Square D D323NBR, pair it with appropriately rated fuses for your 100 A, 240 V circuits and implement a strict lockout/tagout protocol. Use padlocks to secure the disconnect during service windows, and train maintenance personnel to verify isolation before beginning any work. This approach helps minimize risk, reduces downtime, and extends the life of downstream equipment by ensuring clean, controlled power interruptions.