Square D HU361 - 30A, 600V, 3-Pole, Heavy Duty Safety Switch

The Square D HU361 is a 30A, 600V, 3-pole heavy-duty safety switch engineered for reliable electrical isolation in demanding industrial and commercial environments. Built to support proper lockout/tagout procedures and deliver confident disconnection under load, this unit is a trusted solution for maintenance, servicing, and safe operation of powered equipment.

Key specifications

• Amperage rating: 30 A
• Voltage rating: 600 V
• Number of poles: 3-Pole
• Product type: Heavy Duty Safety Switch
• Brand: Square D
• Model: HU361

Why the HU361 stands out

Designed for rugged, real-world use, the HU361 prioritizes dependable isolation when it matters most. Its heavy-duty construction is purpose-built for environments where safe maintenance depends on reliable disconnection, even under load. The switch integrates seamlessly into 600V circuits, providing a clear, decisive disconnect point to protect personnel and equipment during servicing, repairs, and commissioning.

Ideal use cases

• Machine and line isolation in manufacturing facilities, ensuring safe access during setup, changeovers, and maintenance
• Service disconnects for commercial electrical rooms and panels, enabling compliant lockout/tagout procedures
• Temporary or permanent electrical isolation for equipment upgrades, retrofits, or new installations

Safety, reliability, and compliance

When worker safety and uptime are non-negotiable, the HU361 delivers. By providing a dedicated disconnect point that supports lockout/tagout, it helps prevent accidental energization during servicing. Its 3-pole configuration ensures effective isolation of all conductors in multi-phase systems, reducing the risk of stray currents and enhancing overall system safety in high-demand environments.

Practical deployment tips

• Pair the HU361 with clear tagging and locking hardware to maximize LO/TO effectiveness during maintenance
• Verify the disconnect operates smoothly across its full range of motion and confirm it remains easily accessible for technicians
• Document the installation in facility safety procedures, noting the 30A/600V ratings for correct circuit planning

What you gain with Square D HU361

Reliable, clearly identifiable electrical isolation for 30A circuits up to 600V, delivered in a robust, purpose-built safety switch. It’s a practical choice for facilities prioritizing worker safety, procedural compliance, and long-term durability in everyday industrial operations.