Square D H364 - 200A, 600V, 3-Pole, Fused Disconnect Switch

The Square D H364 is a high‑duty Fused Disconnect Switch engineered for precise electrical isolation in demanding industrial and commercial settings. With a 200A rating and a 600V capacity, this 3‑Pole device delivers dependable disconnection even under load, helping you maintain safety and continuity in your electrical systems.

Designed to support proper lockout/tagout procedures, the H364 safeguards maintenance personnel by providing a clear, verifiable isolation point. When service work is necessary, you can lock the switch in the off position and tag it to prevent accidental re-energization, reducing risk and downtime across uptime-critical environments.

Key to its reliability is the fused design, which offers built‑in overload protection for three‑phase circuits. This means less wear on downstream equipment and a more predictable protection strategy for motors, feeders, and other heavy loads. The enclosure features a NEMA 1 rating, making it suitable for indoor, dry locations where dust and incidental moisture are manageable, while supporting long‑term durability in busy facilities.

Product highlights at a glance

• Amperage: 200A
• Voltage rating: 600V
• Poles: 3‑Pole
• Enclosure: NEMA 1 (indoor, dry locations)
• Type: Fused Disconnect Switch
• Brand/model: Square D H364

Why choose the Square D H364? This fused disconnect is purpose-built for reliability in environments where safe maintenance shutdowns, clear isolation points, and durable performance matter most. Its three‑phase design ensures consistent protection across all lines in a typical commercial or industrial power distribution setup, helping you safeguard equipment and personnel alike.

Ideal applications

• Industrial control panels and motor control centers requiring a robust service disconnect
• Commercial electrical rooms and feeders where reliable isolation is essential
• Maintenance areas that rely on lockout/tagout procedures for worker safety
• Systems that demand dependable disconnection under load to protect downstream equipment

Practical guidance for deployment In new installations or replacements, pair the Square D H364 with appropriately rated fuse elements and ensure the enclosure is installed in an indoor, dry location per its NEMA 1 rating. Label the disconnect clearly, implement a formal lockout/tagout process, and coordinate with upstream and downstream protection to achieve a cohesive, safe electrical isolation strategy.