Square D H363NRB - 100A, 600V, 3-Phase, Safety Switch

Square D H363NRB is a rugged 100A, 600V, 3-Phase Safety Switch designed for dependable on/off isolation and overcurrent protection in demanding industrial and commercial environments.

Built to function as a motor disconnect, a distribution point for panelboards, or branch-circuit protection, this compact fusible switch delivers reliable performance where space is at a premium. The H363NRB combines a robust safety mechanism with straightforward maintainability, making routine servicing and fuse replacement quick and simple in busy electrical rooms.

• Model: H363NRB
• Amperage: 100 A
• Voltage: 600 V
• Phase: 3-Phase
• Function: Safety switch with on/off isolation and overcurrent protection
• Configuration: Compact, maintainable fusible switch
• Applications: Motor disconnects, panelboards, branch circuit protection

In environments where space is tight but reliability cannot be compromised, the H363NRB provides a dedicated isolation point for motor-driven equipment and critical circuits. This enables safe maintenance windows, reduces downtime, and helps keep downstream equipment protected from overloads.

Who benefits most

• Facilities engineers and maintenance teams in manufacturing, processing plants, and large commercial buildings
• Electrical contractors and system integrators working on motor control centers and distribution panels
• Operations managers seeking dependable, 3-phase isolation with integrated protection

Why this model stands out

With a 100 A rating and 600 V three-phase capability in a compact form, the H363NRB delivers a space-efficient solution for motor disconnects and panelboard protection without sacrificing performance. The fusible switch design consolidates disconnect and overcurrent protection, simplifying wiring and reducing the number of components in your switchgear assembly.

Practical tips for installation and use

• Confirm that your supply is three-phase and does not exceed 600 V, with a load current within 100 A
• Plan for a fusible disconnect configuration and select the appropriate protective fuses to match the 100 A rating
• Position the switch so the handle is easily reachable and the status is clearly visible during maintenance
• Use as a dedicated motor disconnect or as a reliable point of protection for branch circuits within panelboards

Enhance your electrical distribution with the Square D H363NRB—where dependable isolation meets streamlined protection for demanding 3-phase systems.