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

The Square D H323NRB is a high-performance fused disconnect switch engineered for demanding industrial and commercial environments. With a 100A rating at 240V and a robust 3-pole design, it delivers dependable electrical isolation when you need it most—making safe maintenance and troubleshooting straightforward and compliant with lockout/tagout procedures. Built for long-term durability, this switch stays reliable under load, so you can shut down equipment confidently without sacrificing uptime.

• Precise safety isolation with an integrated fused design that provides overcurrent protection while enabling safe shutdown for servicing and maintenance.
• Lockout/tagout readiness engineered to integrate smoothly into standard lockout/tagout programs, helping you meet safety regulations and protect personnel.
• Reliable performance under load designed to disconnect smoothly even when equipment is energized, reducing the risk of arc or fault during servicing.
• Rugged outdoor/indoor enclosure with a NEMA 3R-rated housing built to withstand varying environments, protecting electrical components from weather, debris, and moisture.
• Industrial compatibility 3-pole configuration at 100A and 240V suits a wide range of motors, feeders, and control circuits commonly used in manufacturing, HVAC, and processing facilities.

Why choose the H323NRB for your facility

Unlike generic disconnect switches, the H323NRB is purpose-built for safety, reliability, and ease of service in real-world settings. The fused design provides immediate fault protection, while the sturdy enclosure ensures dependable operation across shifts and seasons. If you’re upgrading a line or implementing a new safety protocol, this switch offers a clear, durable path to compliant, efficient electrical isolation.

Use cases and ideal applications

• Shutdowns and service work on motors, pumps, conveyors, and HVAC equipment.
• Outdoor equipment bays or loading docks where weather exposure is a concern (NEMA 3R protection).
• Facilities implementing formal lockout/tagout programs to meet OSHA and other safety standards.
• Feeder disconnects on equipment requiring reliable, fail-safe isolation at the point of power control.

Specifications at a glance

• Amperage rating: 100A
• Voltage rating: 240V
• Poles: 3-Pole
• Enclosure rating: NEMA 3R
• Product type: Fused Disconnect Switch
• Brand: Square D
• Model: H323NRB