Square D HU363 - 100A, Safety Switch

The Square D HU363 100A Safety Switch is engineered for reliability in industrial and commercial environments where electrical isolation is non-negotiable. Built to support proper lockout/tagout procedures and deliver a clean, dependable disconnection, this safety switch is designed to perform when it matters most—during maintenance, servicing, and routine safety checks.

Why the HU363 stands out

• 100A amperage rating provides robust protection for medium to heavy electrical loads, helping you isolate equipment quickly and safely.
• Reliable disconnection under load ensures energy is cut off cleanly, reducing the risk of unexpected re-energization during service or maintenance.
• Lockout/tagout compatibility supports compliant maintenance procedures, helping your team keep downtime safe and organized.
• Long-term durability built for demanding industrial and commercial use, delivering consistent performance over time.
• Trusted Square D quality from a brand with a long history of electrical safety and reliability.

The HU363 Safety Switch is more than a switch—it's a critical component of your safety and maintenance workflow. When a machine or line needs to be isolated for servicing, this switch provides a clear, dependable disconnect that keeps energy sources isolated until you’re ready to re-energize the system.

Ideal use cases

• Maintenance shutdowns on equipment and machinery in manufacturing or facility operations
• Electrical panel upgrades or servicing where guaranteed isolation is required
• Temporary isolation during system testing, inspection, or safety audits
• Any commercial or light-industrial application where reliable, code-aligned electrical isolation is essential

Specifications at a glance

• Amperage Rating: 100A
• Product Type: Safety Switch
• Brand: Square D
• Model: HU363

Fast, decisive action is the cornerstone of effective electrical safety. The Square D HU363 delivers that decisiveness with a design focused on dependable performance, straightforward integration into existing installations, and compatibility with standard lockout/tagout practices. It’s a practical, durable choice for teams that prioritize safety, reliability, and continuity in their electrical systems.

Maintenance and best practices

Periodically inspect the switch for signs of wear or corrosion, ensure the enclosure remains sealed against dust and moisture, and verify smooth operation of the mechanism. Document lockout/tagout procedures and train staff on proper process steps to maximize the safety benefits of the HU363 in daily operations.