Square D HU363RB 100A 3P 600V Safety Switch, NEMA 3R, Fusible, Non-Fusible | AmpState

Meet the Square D HU363RB 100A 3P 600V Safety Switch—built for everyday electrical work and designed to simplify equipment disconnect and isolation at the point of use. This switch is the smart choice for retrofit projects and maintenance planning when you need a part number you can trust to stay consistent across upgrades.

• 100 A, 3-pole, 600 V rating powers demanding feeders and control circuits with confidence.
• NEMA 3R enclosure ready for outdoor and damp environments, providing reliable protection against rain and weather while keeping operations safe.
• Fusible and Non-Fusible configurations available in one product lineage to align with your protection strategy without reinventing the wiring plan.
• Point-of-use disconnect enables swift isolation for servicing, reducing maintenance downtime and improving workflow efficiency.
• Retrofit-friendly with a consistent part number—simplifies stocking, ordering, and future replacements in ongoing projects.
• Trusted brand Square D delivers proven reliability in safety switches used across industrial and commercial applications.

Ideal use cases—where this safety switch truly shines:

• Outdoor feeders for pumps, fans, HVAC equipment, and exterior lighting that require dependable disconnection at the source.
• Equipment isolation in control panels, machine rooms, and service entrances where quick, safe de-energizing is essential.
• Maintenance planning that benefits from a consistent part number to minimize downtime and streamline parts logistics.

Why choose this model? The HU363RB is purpose-built for reliability and uptime. Outdoor-ready protection (NEMA 3R) means fewer weather-related concerns, while the dual Fusible/Non-Fusible options give you the flexibility to match your existing protection scheme. This is a practical, future-proof choice for facilities that prioritize safety, efficiency, and long-term parts availability.

Spec snapshot:

• Manufacturer: Square D
• Model: HU363RB
• Product Type: Safety Switch
• Amperage: 100 A
• Poles: 3
• Voltage: 600 V
• Enclosure: NEMA 3R
• Configurations: Fusible, Non-Fusible
• Availability: AmpState

Need help confirming fit or selecting the right configuration for your system? Send us a message and our team will verify compatibility and guide you to the best match for your electrical setup.