Square D H321NRB - 30A, 240V, Disconnect Switch

The Square D H321NRB is a purpose-built 30A, 240V disconnect switch designed for demanding industrial and commercial environments where safe, reliable electrical isolation is non-negotiable. Built to support proper lockout/tagout procedures, this switch delivers dependable disconnection under load, helping technicians service equipment safely and efficiently while reducing downtime.

Key advantages

• 30A at 240V capacity tailored for control circuits, motor starters, and equipment disconnects common in industrial settings.
• Lockout/Tagout compatibility supports safe servicing workflows, ensuring energy isolation is clearly communicated and verifiable before maintenance begins.
• Under-load disconnection provides reliable shutdown even when equipment is energized, improving safety during routine checks and repairs.
• Durable construction designed to withstand the rigors of busy commercial and industrial environments, delivering long-term reliability.
• Easy integration with existing electrical panels and wiring schemes, making it a practical upgrade for upgrading or replacing aging disconnects.

Ideal use cases

• Machine and conveyor line isolation in manufacturing facilities
• Service disconnects for commercial equipment and HVAC subsystems
• Control panel isolation for routine maintenance and safety procedures

Why this matters

Choosing the Square D H321NRB means prioritizing safety without sacrificing reliability. Its design supports critical safety practices, including lockout/tagout, while providing a straightforward, dependable means to disconnect power when servicing equipment. This translates to fewer unexpected outages, quicker maintenance turnarounds, and clearer compliance with safety standards.

Specifications at a glance

• Amperage Rating: 30A
• Voltage Rating: 240V
• Product Type: Disconnect Switch
• Brand: Square D
• Model: H321NRB

Practical usage tips

• Plan maintenance windows around lockout/tagout procedures to maximize safety and minimize unplanned downtime.
• Pair the H321NRB with clearly labeled disconnect points and a documented isolation checklist to streamline servicing and inspections.
• Ensure wiring and installation follow relevant electrical codes and manufacturer guidelines for a secure, code-compliant setup.