Square D HU363NRB 100A 3P 600V Safety Switch, NEMA 3R, Fusible, Non-Fusible | AmpState

Meet the Square D HU363NRB—a rugged safety switch engineered for reliable equipment disconnect and isolation at the point of use. Built to perform in demanding environments, this 100 A, 3-pole switch provides a clear, safe path to disconnect power when maintenance or servicing is required, helping you protect personnel and equipment with confidence.

Key specifications at a glance

• Maker: Square D
• Part number: HU363NRB
• Amperage: 100 A
• Poles: 3
• Voltage: 600 V
• Enclosure rating: NEMA 3R (outdoor-ready, rain and ice resistant)
• Configuration options: Fusible or Non-Fusible
• Availability: Sold through AmpState

What makes the HU363NRB unique

• Flexible protection configuration: Choose fusible or non-fusible operation to align with your protection scheme and maintenance strategy without swapping hardware.
• Outdoor-ready, weatherproof design: NEMA 3R rating means dependable performance in exposed or damp environments, reducing concern for weather-related interruptions.
• Direct point-of-use isolation: Ideal for equipment disconnect at the source, enabling safer servicing and safer powered-down shutdowns on the line.
• BOM-aligned replacement: Selecting HU363NRB helps keep your bill of materials consistent with the original part number, simplifying spares management and procurement.
• Proven compatibility: As a Square D part, it’s designed to integrate smoothly with related panels and switchgear, minimizing fitment surprises during retrofit or new installations.

Ideal use cases

• Outdoor or harsh-environment equipment that requires a robust, field-ready disconnect switch
• Replacement projects where preserving the original BOM is critical for downtime planning and parts sourcing
• Maintenance operations requiring a clearly identifiable, safe off position at the point of use
• Installation of new systems or retrofits in facilities where a reliable, 3-pole, 100 A disconnect is needed

Why this matters for your project

The HU363NRB delivers a concrete, everyday impact on reliability and maintenance efficiency. Its dual fusible/non-fusible configuration lets you tailor protection to your specific circuit and downtime tolerance, while the 600 V rating supports a broad range of industrial applications. The NEMA 3R enclosure means fewer weather-related concerns, so technicians can perform disconnects confidently in outdoor or challenging environments. And because it’s part of the Square D family, you gain a predictable, compatible component that aligns with existing electrical drawings and spare inventories.

Practical tips for ordering and use

• Verify your existing BOM and order HU363NRB to maintain part-number continuity across replacements.
• Consider whether your circuit protection plan benefits from a fusible or non-fusible configuration, and select accordingly.
• If you’re unsure about fit or compatibility, AmpState offers support to confirm the right choice for your panel and system.

Choose the Square D HU363NRB for dependable, at-the-source safety switching that supports straightforward maintenance, robust outdoor use, and BOM-consistent replacements—backed by AmpState’s availability and service.