Square D H326N 600A 3P 240V Safety Switch, NEMA 1, Fusible | AmpState

Meet the Square D H326N: a rugged, fusible safety switch engineered for reliable equipment disconnect and isolation at the point of use. With a 600 A rating across 3 poles at 240 V, this NEMA 1 enclosure is designed for indoor electrical rooms and industrial spaces where fast, safe isolation is non‑negotiable.

Exact BOM-compatible replacement — the H326N is the ideal choice for replacement projects and stocking spares when you need to keep the bill of materials aligned to the original part number. Because this is the exact part your system was built around, you’ll avoid footprint mismatches, rewiring guesswork, or compatibility hiccups during maintenance or upgrades.

• Key specs: Square D, H326N, 600 A, 3P, 240 V, NEMA 1, Fusible
• Purpose: indoor equipment disconnect and isolation at the point of use, providing reliable overcurrent protection when paired with the correct fuses
• Ideal for: heavy machinery, large motor circuits, manufacturing lines, conveyors, and HVAC disconnects in industrial environments
• Operational advantage: simplifies maintenance windows by delivering a true, exact-match component that fits established electrical footprints and wiring schemes
• Availability: available from AmpState with support to confirm fit and compatibility

Why this matters in practice: choosing a fusible, three‑pole disconnect like the H326N means you’re pairing a robust switching device with the protective granularity you need for 600 A circuits. It supports controlled isolation for maintenance, reduces downtime by fitting straight into existing assemblies, and helps maintain regulatory and safety standards in your electrical rooms.

Use cases and scenarios — install this switch wherever a reliable point‑of‑use disconnect is required for large motors, compressors, or process equipment operating on 240 V three‑phase power. It’s particularly valuable in retrofit projects where you’re restoring legacy protection schemes or aligning spares with the original equipment manufacturer’s numbering.

Practical tips:

• Verify that your system is configured for 240 V three‑phase service and that a NEMA 1 indoor enclosure is appropriate for your environment.
• Pair the fusible switch with the correct fuse blocks and protective devices to ensure proper overcurrent protection.
• Keep an exact BOM-aligned spare on hand to minimize downtime during maintenance or part replacement.
• If you’re unsure about fit, message us — AmpState can help confirm compatibility and guide you to the right part for your installation.

Ready to source an exact, reliable replacement? The Square D H326N 600 A, 3P, 240 V Safety Switch (NEMA 1, Fusible) is available from AmpState. Need help matching a part number or confirming compatibility? Message us and we’ll help you confirm fit.