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

The Square D H321N is a high-performance fused disconnect switch designed for demanding industrial and commercial environments that demand safe, reliable electrical isolation. With a 30A, 240V rating across three poles, this device provides decisive control over three-phase circuits while supporting proper lockout/tagout procedures for safer maintenance and servicing.

• Three-pole reliability ensures complete isolation across all phases, reducing the risk of partial circuit energization and simplifying safe servicing of equipment.
• Fused protection adds current interruption capability at the source, helping to manage fault currents and protect downstream equipment and personnel.
• Indoor, general-use enclosure with a NEMA 1 rating makes it well-suited for clean, non-corrosive spaces such as control rooms, switchgear areas, and manufacturing floors.
• Lockout/tagout readiness supports compliant maintenance procedures, giving workers a clear, verifiable way to secure circuits during service.
• Durability for long-term use designed to withstand regular on/off operation in busy environments, delivering dependable disconnection when you need it most.

Ideal for: motor control circuits, conveyor lines, HVAC equipment, and other three-phase installations where reliable isolation is essential for safety and uptime. Whether you're upgrading legacy gear or specifying new equipment for a busy production line, the H321N provides a compact, robust solution that integrates with existing electrical distributions without sacrificing safety or performance.

Why choose the H321N over non-fused disconnects? The built-in fusing complements the switch by offering immediate current interruption at the source, helping manage surge and fault conditions while enabling straightforward lockout/tagout workflows. This means easier maintenance, improved safety, and reduced downtime in everyday operations.

Technical snapshot:

• Amperage rating: 30A
• Voltage rating: 240V
• Number of poles: 3-Pole
• Enclosure: NEMA 1
• Product type: Fused Disconnect Switch
• Brand/model: Square D H321N

Equip your electrical system with a purpose-built, safety-first disconnect that engineers and technicians can rely on. The Square D H321N translates industrial-grade protection into practical, everyday reliability for a safer, more efficient operation.