Square D H363NRB - 100A, 600V, 3-Pole, Fused Disconnect Switch

Square D H363NRB is a high-performance Fused Disconnect Switch engineered for industrial and commercial environments that demand safe electrical isolation. With a 100A rating and a 600V maximum, this 3-Pole configuration delivers dependable control and protection for three-phase circuits.

Designed to enable proper lockout/tagout procedures and provide a reliable disconnection under load, the H363NRB combines protective fusing with robust construction for long-term durability in demanding settings. This switch is built to help maintenance teams work safely, minimize downtime, and safeguard downstream equipment during service or emergencies.

Key specifications

• Amperage rating: 100A
• Voltage rating: 600V
• Number of poles: 3-Pole
• Product type: Fused Disconnect Switch
• Brand: Square D
• Model: H363NRB

What makes this fuse-disconnect stand out

• Fused protection: integrates fuses to interrupt fault currents and protect downstream circuitry.
• Three-pole design: ensures balanced isolation across all three phases for safer maintenance and reliable performance.
• Disconnection under load: designed to reliably interrupt power without compromising safety or control during operation.
• Lockout/tagout readiness: supports safe energy isolation procedures so maintenance teams can work with confidence.
• Rugged durability: built to endure the rigors of industrial environments, delivering long-term service life.

Ideal use cases

• Motor circuits and feeders in manufacturing, processing, and packaging facilities.
• Service disconnects for large equipment where clear, code-compliant isolation is required.
• Control panels and power distribution setups that demand reliable, safe startup and shutdown.
• Maintenance workflows where lockout/tagout is essential for worker safety and equipment protection.

Why it matters for your operation

The Square D H363NRB blends essential overcurrent protection with dependable isolation, reducing the risk of equipment damage during faults and making routine maintenance safer and more efficient. Its 3-pole, 100A, 600V specifications cover a wide range of three-phase applications, giving you a single, reliable solution for high-demand electrical systems.

Practical tips for getting the most from this switch: pair it with correctly rated fuses to match your system’s current and voltage, follow your organization’s lockout/tagout procedures, and ensure proper wiring and mounting according to the manufacturer’s guidelines. This approach helps maximize safety, uptime, and the longevity of both your electrical infrastructure and your workforce.