Square D HU363 - 100A, 600V, 3-Pole, Non-Fusible Disconnect Switch

The Square D HU363 Non-Fusible Disconnect Switch is built for dependable electrical isolation in demanding industrial and commercial settings. With a robust 3-pole design, it cleanly disconnects three‑phase circuits up to 600V, delivering a safe, mechanical break that supports rigorous lockout/tagout procedures and maintenance work without the complexity of installed fuses.

Key specifications at a glance

• Amperage rating: 100A
• Voltage rating: 600V
• Number of poles: 3-Pole
• Enclosure rating: NEMA 1 (indoor, basic protection against dust and incidental contact)
• Type: Non-Fusible Disconnect Switch
• Brand & model: Square D HU363

Why choose a non-fusible disconnect

For facilities that require rapid, repeatable isolation without the need for fuses, the HU363 provides a straightforward, durable solution. Its non-fusible design means there are no internal fusible links to replace, reducing maintenance overhead and downtime when performing routine servicing or safety checks. This switch is purpose-built to enable confident lockout/tagout (LOTO) compliance, giving technicians a clear, hands-on method to de-energize equipment before work.

Core benefits and real-world scenarios

• Safe maintenance, every time: The 3-pole configuration ensures simultaneous isolation of all hot legs in a three-phase system, minimizing the risk of partial energization during service.
• Indoor reliability: With a NEMA 1 enclosure, the HU363 is optimized for indoor installations where basic dust and incidental moisture protection suffice, making it a reliable choice for panels, switchgear rooms, and control centers.
• Durable, long-term performance: Built to withstand the rigors of daily operation in busy commercial and industrial environments, it maintains consistent disconnection performance under load across years of service.
• Versatile applications: Ideal for panel boards, motor control centers, feeders, and equipment isolation points where quick, clear de-energization is essential for safety and uptime.
• Operational clarity: The mechanical actuation provides a direct, tactile feedback when the circuit is opened or closed, supporting intuitive and reliable operation by skilled technicians.

How this compares to alternatives

Compared to fusible disconnect options, the Square D HU363 offers immediate, fuse-free disconnection that’s easier to inspect and reset after maintenance. The non-fusible approach minimizes the ongoing need for fuse inventory and replacement, while still prioritizing safety through robust isolation. For facilities prioritizing straightforward, repeated isolation without fuse management, the HU363 stands out as a lower-maintenance, dependable choice.

Ideal for your facilities and teams

• Manufacturing floors with heavy equipment that require routine servicing and lockout procedures
• Commercial buildings needing reliable indoor disconnects for electrical feeders and control circuits
• Maintenance teams seeking a simple, durable solution for safe equipment isolation in three-phase systems

With the Square D HU363, you gain a certified, straightforward isolation device that aligns with safety protocols, supports efficient maintenance workflows, and delivers dependable performance across years of daily use. If you need a reliable 100A, 600V, 3-pole non-fusible disconnect switch designed for practical, real-world application, the HU363 is purpose-built to meet those demands.