Square D H321N - 30A, 240V, 3-Pole, Heavy Duty Fused Disconnect Switch

The Square D H321N is a purpose-built, high-performance Heavy Duty Fused Disconnect Switch engineered for demanding industrial and commercial environments. With a 30A rating at 240V and a 3-Pole configuration, it delivers safe, reliable electrical isolation when you need to disconnect power quickly and confidently.

Why the H321N stands out

• Complete three-phase isolation—the 3-pole design ensures all hot legs are safely disconnected, minimizing arc risk and enabling safe maintenance on 3-phase equipment.
• Safe, reliable disconnection under load—engineered to interrupt current cleanly, supporting service and repair work without compromising safety.
• Heavy-duty construction built for long-term durability in harsh environments, delivering consistent performance across shifts and seasons.
• Lockout/Tagout compatibility—designed to support proper lockout/tagout procedures, helping facilities maintain rigorous safety and compliance standards during maintenance.
• Industry-ready choice from Square D, a trusted name in electrical protection and control, offering dependable isolation for critical equipment and panels.

Ideal applications

• Motor control centers, conveyors, pumps, fans, and other 3-phase machinery
• Maintenance disconnects for industrial and commercial equipment
• Control panels and power distribution where immediate, clear isolation is required

What this means for you

With the Square D H321N, you gain a dedicated safety switch that not only protects personnel during servicing but also supports reliable uptime for your operations. The fused design provides necessary overcurrent protection, helping coordinate with downstream protection devices and reducing the potential for damage during faults. Whether you’re outfitting a new panel or upgrading an aging disconnect, the H321N delivers clear performance you can depend on day after day.

Specifications at a glance

• Amperage rating: 30A
• Voltage rating: 240V
• Number of poles: 3-Pole
• Product type: Heavy Duty Fused Disconnect Switch
• Brand: Square D
• Model: H321N

Ready to enhance safety and reliability in your electrical installations? Choose the Square D H321N for a robust, purpose-built solution that keeps your systems secure and your maintenance teams protected. Add to cart today and equip your panels with a trusted disconnect you can depend on.