Square D DU323 - 100A, 250V, Disconnect Switch

Meet the Square D DU323 100A, 250V Disconnect Switch — a purpose-built solution for safe electrical isolation in demanding industrial and commercial settings. Engineered to support lockout/tagout procedures, it delivers dependable disconnection under load and is built for long-term durability in harsh environments.

• Amperage rating: 100 A
• Voltage rating: 250 V
• Product type: Disconnect Switch
• Brand: Square D
• Model: DU323

Why this disconnect switch matters

• Reliable isolation under load: When maintenance is needed, the DU323 provides a secure disconnection even with circuits carrying current, helping protect personnel and equipment during service work.
• Lockout/tagout readiness: Designed to integrate with standard lockout/tagout procedures, it supports safe, compliant maintenance shutdowns in busy facilities.
• Industrial-grade durability: Built to withstand the rigors of daily industrial and commercial use, delivering consistent performance over the long term.
• Versatile for 100A feeders: A practical solution for motors, feeders, and control circuits where reliable isolation is essential.

Ideal applications and use cases

• Service disconnects for motor-driven equipment, conveyors, pumps, and fans in manufacturing or logistics environments.
• Panelboard or switchgear installations where quick, clear isolation improves maintenance safety.
• Facilities management and electrical maintenance programs that require adherence to lockout/tagout practices.

Choosing the DU323 over generic switches provides tangible safety and operational advantages. The combination of a solid 100A rating, 250V capability, and built-in support for lockout/tagout creates a safer maintenance workflow, reduces downtime during service, and extends the life of downstream equipment by ensuring clean, controlled shutdowns.

Practical tips for maximizing safety and longevity

• Verify compatibility with your existing panel or MCC configuration and ensure proper mounting for reliable operation.
• Integrate the DU323 into your lockout/tagout procedure—provide clearly labeled hasp points and documented maintenance steps.
• Schedule periodic inspections to confirm smooth mechanical action and verify there are no signs of wear or corrosion that could affect disconnection reliability.