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

Meet the Square D H221NRB Safety Switch — a purpose-built isolation solution engineered for demanding industrial and commercial environments. With a 30A, 240V, 2-pole design and a rugged NEMA 3R enclosure, it delivers dependable disconnection and safe maintenance every time.

Key specifications

• Amperage: 30A
• Voltage: 240V
• Poles: 2-Pole
• Enclosure: NEMA 3R (weather-resistant, suitable for outdoor and harsh conditions)
• Product Type: Safety Switch
• Brand: Square D
• Model: H221NRB

Why this safety switch stands out

• Lockout/Tagout ready: Built to support proper lockout/tagout procedures, helping you meet safety and compliance requirements during maintenance.
• Disconnection under load: Designed to safely interrupt current even when equipment is energized, reducing the risk of arc flash and enabling safer service modes.
• Reliable, durable isolation: The 2-pole configuration isolates both hot conductors, delivering a clear, definitive disconnect for complex electrical systems.
• Weather-resistant enclosure: NEMA 3R-rated housing protects internal components from outdoor exposure, rain, and dust—extending service life in rugged environments.
• Straightforward installation and maintenance: A robust, easy-to-wire design that supports quick field wiring, simple inspections, and long-term reliability in daily operation.

Ideal use cases

Optimal for outdoor and indoor equipment where reliable isolation is essential. Common applications include outdoor HVAC units, pumps, conveyors, motors, and other industrial machinery that require safe, code-compliant disconnection for servicing and routine maintenance.

Practical benefits and outcomes

• Improved safety for maintenance personnel through verifiable, lockable isolation.
• Minimized downtime by providing swift, dependable disconnection under load.
• Enhanced system reliability with a purpose-built enclosure designed to withstand real-world conditions.
• Clear, unambiguous electrical separation that supports standard electrical practices and compliance workflows.

Tips for deployment

Plan for access to the switch for routine LOTO procedures and ensure the 240V, 30A circuit is appropriately protected by compatible fusing or circuit breakers. Position the enclosure for easy reach during maintenance, and service or replace any worn components promptly to preserve long-term performance.

Choose the Square D H221NRB when you need a proven, rugged safety switch that delivers reliable isolation, supports lockout/tagout, and stands up to the demands of busy industrial and commercial environments.