Square D H323N - 100A, 3-Pole, Fused Disconnect Switch

Meet the Square D H323N — a 100A, 3-Pole, Fused Disconnect Switch designed to deliver safe electrical isolation in demanding industrial and commercial environments. Built for reliability, it supports proper lockout/tagout procedures and provides dependable disconnection under load, ensuring long-term durability for critical systems.

Why the H323N is the right choice for your panel and motor circuits

• Three-pole configuration for 3-phase systems: Ensures all phases are simultaneously interrupted for clean, balanced isolation of motors, drives, and conveyors.
• 100A amperage rating: Suitable for typical industrial loads while accommodating startup surges common in HVAC, pumps, and processing equipment.
• Fused protection: Integrated fusing provides overcurrent protection and controlled disconnection, reducing arc energy and safeguarding downstream components.
• NEMA 1 enclosure: Indoor-rated enclosure that shields the switch from dust and incidental contact, simplifying installation in control rooms and equipment spaces.
• Lockout/Tagout readiness: Designed to support compliant maintenance practices — lock the disconnect in the OFF position and apply tags to prevent accidental re-energization.
• Rugged, durable construction: Built to withstand the rigors of busy facilities, with dependable performance across temperature fluctuations and routine operation.

Ideal use cases

The Square D H323N is a versatile solution for power isolation in a range of settings, including motor control centers, service disconnects, and equipment enclosures. Typical applications include controlling motors, pumps, and conveyors, performing maintenance shutdowns with lockout/tagout compliance, and indoor distribution in manufacturing, packaging, and processing facilities.

What sets this fused disconnect apart

Compared with non-fused disconnects, the H323N adds protective fusing to interrupt fault currents safely and protect downstream devices. The 3-pole design guarantees simultaneous interruption of all phases, reducing risk during servicing and helping you maintain regulatory and safety standards. For optimal performance, pair the H323N with correctly sized fuses and conduct routine inspections to ensure reliable operation.