Square D H323NRB 100A 3P 240V Safety Switch, NEMA 3R, Fusible | AmpState

Meet the Square D H323NRB 100A 3P 240V Safety Switch — a rugged, fusible disconnect designed for reliable equipment isolation at the point of use. With its NEMA 3R enclosure, this switch delivers steadfast protection against outdoor weather, dust, and moisture while providing precise overcurrent protection tailored to your 3‑phase loads.

• Electrical rating: 100 A, 3‑pole, 240 V — built to handle standard industrial motor and equipment circuits.
• Enclosure: NEMA 3R weatherproof housing suitable for outdoor or harsh indoor environments, keeping your disconnect protected from rain, ice, and debris.
• Fusible configuration: Fusible design that accepts field-appropriate fuses to safeguard downstream equipment and wiring. This means you’ll need to select the correct fuse type and rating for your specific application.
• Point-of-use isolation: A reliable disconnect at the equipment level, simplifying maintenance, emergency shutdowns, and safe servicing without pulling power upstream.
• Replacement & BOM alignment: Ideal for replacement projects and stocking spares when you need to keep your bill of materials aligned with the original part number.
• Brand & support: Authentic Square D quality, available from AmpState with assistance to confirm fit and compatibility for your system.

This safety switch is purpose-built for those who need dependable, code-compliant isolation for outdoor motors, pumps, conveyors, HVAC units, and other three‑phase equipment. The NEMA 3R rating means you won’t compromise reliability in wet or exposed environments, while the 100 A capacity covers a wide range of industrial and commercial loads.

Why this safety switch stands out

• Concrete, field‑tested protection: The fusible configuration lets you tailor protection to your load’s inrush and continuous operating current, reducing nuisance trips while safeguarding conductors and motors.
• Operational reliability at the point of use: With a dedicated disconnect, maintenance teams can safely isolate equipment without disrupting other circuits or upstream feeders.
• Easy BOM management: Using the H323NRB helps keep spares and replacements consistent with the original design, minimizing compatibility surprises during maintenance or upgrades.

Ideal for professionals who value durability, clarity, and straightforward maintenance, this Square D safety switch provides a practical, code-compliant solution for outdoor-ready protection. If you’re unsure about compatibility, AmpState offers support to help confirm fit based on your existing panel, motor starter, or control wiring arrangements.