Square D D323N - 100A, 240V, 3-Pole, Fused Disconnect Switch

The Square D D323N is a rugged, dependable 3-Pole Fused Disconnect Switch designed for industrial and commercial environments where safe electrical isolation is non-negotiable. With a 100A rating at 240V, it delivers a clean, reliable disconnect under load, helping protect personnel during maintenance and reduce downtime when faults occur. Built to support lockout/tagout procedures, this switch streamlines safety workflows from installation to servicing.

Key specifications

• Amperage Rating: 100A
• Voltage Rating: 240V
• Number of Poles: 3-Pole
• Product Type: Fused Disconnect Switch
• Brand: Square D
• Model: D323N

Why the D323N stands out

• Three-pole design provides true three-phase isolation, paired with built-in fusing for overcurrent protection on 3-phase loads
• Durable construction optimized for long-term service in busy industrial and commercial settings
• Disconnection under load is dependable, helping prevent equipment damage and enhance safety during maintenance
• Designed to support lockout/tagout procedures, making it easier to secure circuits during service
• Panel-friendly wiring and straightforward integration into existing electrical distributions

Ideal applications

Use the Square D D323N as the main service or equipment disconnect for three-phase motors, conveyors, processing lines, HVAC systems, and other 3‑phase loads. It’s well-suited for control panels, motor control centers, and feeder disconnects where reliable isolation and protective fusing are essential for uptime and safety.

Practical benefits in daily operation

When time matters, the D323N delivers steady performance: quick, clean disconnections, safeguarded maintenance work through lockout/tagout readiness, and minimized risk from under-load or fault conditions. This combination helps facilities run more predictably, protect critical equipment, and maintain safer work environments for technicians and operators alike.

Tips for optimal use

Plan fuse replacement and inspection as part of routine maintenance, ensure proper alignment with your three-phase system, and verify that installation follows electrical drawings and safety protocols. The D323N is a focused solution for reliable electrical isolation—designed to perform when it matters most.