Square D HU221DS - 30A, 600V, 2-Pole, Safety Switch

The Square D HU221DS Safety Switch is purpose-built for industrial and commercial environments where safe electrical isolation is non-negotiable. With a 30A current rating at 600V and a compact 2-pole design, this switch delivers dependable disconnection under load while seamlessly integrating with lockout/tagout procedures to protect maintenance personnel and equipment.

Key specifications

• Amperage Rating: 30A
• Voltage Rating: 600V
• Number of Poles: 2-Pole
• Product Type: Safety Switch
• Brand: Square D
• Model: HU221DS

Why this safety switch matters

Lockout/tagout compatibility is built into the HU221DS, enabling technicians to secure equipment during service and maintenance. The switch is engineered to provide reliable disconnection under load, helping prevent accidental energization and enhancing workplace safety. Its robust construction is designed for long-term durability in demanding environments, reducing replacement and maintenance costs over time.

Key benefits and distinguishing features

• Safe isolation when it matters most: Specifically designed to interrupt power cleanly and safely, even while equipment is live during certain maintenance scenarios.
• Two-pole configuration for complete shutdown: Isolates both conductors to ensure full equipment de-energization.
• Supports lockout/tagout procedures: Facilitates compliant safety practices, protecting personnel during servicing and inspections.
• Industrial-grade durability: Built to withstand the rigors of daily use in busy facilities, helping maintain reliable operation over time.
• Versatile compatibility: Suitable for a wide range of electrical systems requiring a robust 2-pole safety switch at up to 600V.

Ideal applications

• Maintenance and service shutdowns on industrial machinery and production lines
• Electrical rooms and service panels where safe isolation is required
• Commercial facilities needing a dependable disconnect for equipment like pumps, conveyors, and motors
• Any setup prioritizing clear, compliant lockout/tagout practices and rapid, safe de-energization

How this compares to standard switches

Unlike generic disconnects, the HU221DS centers safety and long-term reliability. It combines a strict 2-pole isolation with built-in support for lockout/tagout, ensuring maintenance teams can lock out power sources confidently and avoid accidental re-energization. This thoughtful combination reduces downtime, improves safety outcomes, and aligns with best practices for industrial electrical safety.

Getting the most from your HU221DS

Install by qualified electrical personnel following all local codes and safety regulations. Pair the HU221DS with proper lockout/tagout devices and signaling, and routinely inspect the switch for secure mounting and clean contact surfaces to maintain optimal performance.