Square D H221NRB - 30A, 240V, 2-Pole, Fused Disconnect Switch

The Square D H221NRB is a purpose-built fused disconnect switch that delivers reliable electrical isolation in demanding industrial and commercial settings. With a 30A rating at 240V and a 2-pole design, this unit provides robust, clear-cut disconnection for safely servicing equipment while minimizing downtime. Its fuse protection adds an extra layer of protection for downstream components, helping to guard motors, pumps, and control circuits from fault currents. Built to endure frequent operation and challenging environments, the H221NRB is a dependable choice for mission-critical electrical isolation.

Key specifications

• Amperage: 30A
• Voltage: 240V
• Poles: 2-Pole
• Type: Fused Disconnect Switch
• Brand/Model: Square D H221NRB

Why this fused disconnect stands out

Unlike non-fused disconnects, the H221NRB adds fuse protection to interrupt current quickly and protect downstream devices when a fault occurs. This makes it especially valuable in environments with motors, conveyors, pumps, and other inductive loads where clean, predictable circuit isolation is essential for maintenance and safety. The two-pole design ensures both live conductors in a 240V circuit are simultaneously disconnected, reducing the risk of partial energization during servicing.

Ideal use cases

• Industrial machinery and motor control installations requiring reliable isolation during maintenance
• Commercial equipment like pumps, compressors, and HVAC systems where safe lockout matters
• Service panels and process lines that demand quick, guaranteed disconnection under load
• Facilities prioritizing lockout/tagout procedures to meet safety and compliance standards

Performance and durability

Designed for long-term durability, the H221NRB stands up to demanding environments and frequent switch operations. The fused design directly supports protective separation of circuits, helping reduce wear on downstream components and promote safer maintenance practices. Its Square D lineage offers confidence in compatibility with standard electrical enclosures and typical industrial wiring practices.

Practical installation and use tips

• Plan for a complete 2-pole isolation path on 240V circuits to ensure full de-energization.
• Pair with appropriate fuses rated for your load to maintain protective coordination and prevent nuisance tripping.
• Follow proper lockout/tagout procedures during servicing, using compatible lockout devices on the switch handle.
• Install by qualified electrical professionals in accordance with local codes and standards.

Choosing the Square D H221NRB means opting for a dedicated, high-performance solution that emphasizes safe, straightforward disconnection and reliable protection for critical equipment. If your application requires clean electrical isolation with built-in fuse protection and a durable, two-pole design, this fused disconnect switch is a precise fit for industrial and commercial environments.