Square D H321N - 30A, 240V, 3-Pole, Fused Safety Switch

The Square D H321N is a 30A, 240V, 3-pole fused safety switch engineered for reliable electrical isolation in demanding industrial and commercial environments. Designed to support proper lockout/tagout procedures, it delivers dependable disconnection under load, helping maintenance teams work safely and efficiently while minimizing downtime.

Why this fused safety switch stands out

• Full three-phase isolation thanks to a 3-pole design that safely interrupts all live conductors in a 3-phase system.
• Fused protection provides controlled current interruption, adding an extra layer of safety for motor loads and control circuits.
• Clear electrical ratings at 30A and 240V, making it a versatile fit for a wide range of equipment in factories, warehouses, and large facilities.
• Lockout/tagout readiness aligned with standard maintenance practices, helping teams secure energy isolation during service and repair.
• Durable, long-term performance built to withstand the rigors of busy industrial environments while delivering consistent disconnection under load.

Ideal use cases

• Motor control centers and conveyors in manufacturing floors where rapid, safe isolation is essential for servicing equipment.
• HVAC pumps and fans in commercial buildings that require reliable shutdown during maintenance windows.
• Industrial pumps, mixers, and processing line equipment where full disconnects are necessary for safe service procedures.
• Maintenance fleets and OEMs seeking a dependable, easy-to-integrate safety switch that supports robust lockout/tagout protocols.

How it fits into your system

Mount the H321N in a compatible electrical enclosure and wire it to the three power conductors. Its fused design ensures a clean, predictable disconnection path under load, reducing arc exposure and enabling technicians to work on energized equipment with confidence. By providing a clear, mechanical disconnect for all three lines, it helps you meet safety requirements and streamline servicing workflows.

Technical specifications

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

Upgrade to the Square D H321N to enhance electrical safety, simplify lockout/tagout procedures, and ensure dependable disconnection under load across your critical systems.