Square D H323NRB - 100A, 240V, 3-Pole, Fused Disconnect Switch

The Square D H323NRB fused disconnect switch is engineered for safe, reliable electrical isolation in demanding industrial and commercial environments. Designed for 100A circuits at 240V, this 3-pole device provides robust protection and straightforward maintenance workflows, making it a trusted choice where uptime and safety matter.

Key benefits that matter in real-world scenarios

• 100A at 240V, 3-pole delivers complete, multi-phase isolation for three-phase equipment, ensuring all conductors are safely disconnected during service.
• Fused disconnect configuration adds overcurrent protection and a controlled interruption, reducing the risk of arc events and equipment damage when servicing or fault conditions occur.
• NEMA 3R enclosure offers dependable weather resistance and durable operation in indoor, outdoor, or Damp locations, without sacrificing accessibility for maintenance.
• Lockout/tagout readiness supports standard safety protocols, allowing technicians to secure the power source during maintenance and inspections.
• Long-term durability designed to withstand the rigors of industrial use, vibration, and routine cycling while maintaining reliable performance over time.

Why this model stands out

Unlike simpler isolators, the Square D H323NRB combines disconnection under load with built-in overcurrent protection, delivering a safer, more predictable maintenance window. Its rugged construction and weather-rated enclosure make it a versatile choice for equipment rooms, outdoor substations, and production lines where reliability and quick, verifiable isolation are non-negotiable.

Ideal applications

• Motor control and drives on production lines and conveyors
• Pumps, fans, and HVAC systems in commercial facilities
• Outdoor equipment disconnects near warehouses, yards, or outdoor plants
• Service disconnects in electrical panels requiring auditable lockout/tagout procedures

How it supports your operation

With the Square D H323NRB, maintenance teams experience clearer safety protocols, faster shutdowns for servicing, and a dependable isolation point that helps minimize downtime. The 3-pole, 100A, 240V configuration is well-suited for standard three-phase systems, while the fused design provides a layered protection strategy that aligns with best practices in electrical safety and compliance.

In short, for facilities that demand durable, code-forward isolation with reliable performance under load, the Square D H323NRB fused disconnect switch is a precision-made choice that protects people, equipment, and productivity.