Square D H363 - 100A, 3-Pole, Fused Disconnect Switch

The Square D H363 is a rugged 100A, 3-Pole Fused Disconnect Switch engineered for industrial and commercial environments where safe electrical isolation is non-negotiable. This switch delivers dependable disconnection under load, pairs with lockout/tagout procedures, and is built for long-term durability in demanding service conditions.

• Integrated overcurrent protection — Fuses within the disconnect provide immediate fault interruption to protect downstream equipment and reduce downtime during maintenance.
• Three-phase readiness — 3-Pole configuration ensures synchronized isolation of all three lines in typical 3‑phase motor and power circuits.
• Indoor, durable enclosure — NEMA 1 enclosure keeps internal components protected in standard indoor environments, contributing to reliable operation over time.
• Lockout/Tagout compatibility — Designed to support safe lockout/tagout practices, helping maintenance crews perform procedures with confidence and compliance.
• Trusted Square D build — A proven choice in electrical safety with compatible fusing options and readily available parts for quick service or replacement.

The H363 shines in service disconnections, equipment isolation, and routine maintenance across a wide range of facilities. Its combination of fused protection and secure isolation makes it a practical, safety-focused choice for electrical rooms, switchgear rigs, and equipment bays where uninterrupted uptime and safety are paramount.

Ideal applications

• Industrial plant electrical rooms requiring reliable three-phase isolation
• Commercial facilities needing compliant lockout/tagout during servicing
• Motor control assemblies and distribution circuits needing integrated protection
• Maintenance shut-down processes where dependable fault interruption is essential

Key specifications

• Amperage Rating: 100A
• Number of Poles: 3-Pole
• Enclosure Rating: NEMA 1
• Product Type: Fused Disconnect Switch
• Brand: Square D
• Model: H363