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

The Square D H321N delivers unmatched reliability for industrial and commercial environments where safe electrical isolation is non‑negotiable. This 30A, 240V, 3‑pole Heavy Duty Fused Disconnect Switch is built to provide dependable disconnection under load while supporting robust lockout/tagout procedures for maintenance teams.

Designed for long‑term durability in demanding settings, the H321N combines rugged construction with precise performance. Its three‑pole configuration ensures clean, reliable isolation for three‑phase circuits, making it an ideal choice for motor drives, pumps, conveyors, and other demanding equipment where uptime and safety matter.

Why the Square D H321N stands out

• Three‑pole design for comprehensive isolation—perfect for three‑phase systems that require voltage and current control across all lines.
• 30A, 240V rating—effective protection for your equipment while accommodating a wide range of industrial loads.
• Heavy‑duty fused protection—provides built‑in overcurrent protection and a clear point of isolation, enhancing safety during maintenance and emergencies.
• Lockout/Tagout readiness—engineered to support safe shutdown procedures, helping teams comply with safety standards and prevent unexpected energization.
• Durable performance in demanding environments—built to withstand the rigors of industrial and commercial applications, delivering consistent disconnection when needed.

Ideal use cases

Use the Square D H321N to safely isolate large electrical loads in manufacturing lines, HVAC systems, processing equipment, and other machinery where reliable off‑line power control is essential. It’s a practical choice for facilities prioritizing safety, compliance, and operational continuity during routine maintenance or in the event of an electrical fault.

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

Upgrade your electrical safety and reliability with the Square D H321N. This disconnect switch is purpose‑built for environments where dependable isolation, fuse protection, and compliant lockout/tagout practices translate directly into safer, more efficient operations.