Square D H363 - 100A, 480/600V, 3-Pole, Fused Disconnect Switch

The Square D H363 is a high-performance fused disconnect switch built for demanding industrial and commercial environments where safe, reliable electrical isolation is non-negotiable. With integrated fuse protection and a design tuned for dependable disconnection under load, the H363 helps you protect personnel, equipment, and processes while supporting rigorous lockout/tagout procedures.

Key features that matter in the field

• Three-pole configuration provides complete isolation of all conductors in a 3-phase system, reducing risk during maintenance and downtime.
• 100 A current rating delivers solid performance for mid-range power feeds and equipment loads without unnecessary complexity.
• 480/600 V voltage rating supports high-voltage industrial applications, aligning with common plant and facility distribution standards.
• Fused protection integrates fault-current interruption directly in the switch, helping protect downstream equipment from short-circuits and overloads.
• Safe lockout and tagout compatibility ensures personnel can secure the circuit during service, inspections, or maintenance shifts.
• Durable, long-term reliability designed to withstand the rigors of busy commercial and industrial environments, reducing replacement and maintenance cycles.
• Square D reliability brand lineage backed by a long history of proven electrical safety solutions, engineered to work consistently within standard electrical distributions.

Why this is the right choice for your facility

When you need a dependable, code-conscious solution for isolating power, the Square D H363 delivers. It consolidates isolation and protection in a single device, helping to simplify panel layouts and reduce the number of components you manage. The three-pole fused design ensures all live conductors are simultaneously disconnected, which is critical for safe servicing of motors, feeders, and other high-power gear.

Ideal use cases

• Service disconnects for industrial equipment and machinery fed from 480/600 V systems
• Dedicated isolation points in commercial or light-industrial power distribution networks
• Maintenance shutdowns where lockout/tagout procedures must be strictly observed

Practical guidance for getting the most from the H363

• Pair with correctly sized fuses to match load requirements and protect downstream devices.
• Incorporate into maintenance routines to verify fuse integrity and ensure proper lockout/tagout readiness.
• When planning upgrades or replacements, consider how a three-pole fused disconnect can simplify future service and reduce downtime.

In short, the Square D H363 is a purpose-built solution for facilities that demand reliable electrical isolation, straightforward maintenance, and durable performance at 100 A with a 480/600 V rating. It’s an investment in safer operations, reduced downtime, and peace of mind for teams responsible for power distribution and equipment protection.