Square D D321N 30A 3P 240V Safety Switch, NEMA 1, Fusible | AmpState

Meet the Square D D321N 30A 3P 240V Safety Switch — a fusible, NEMA 1 disconnect built for everyday electrical work. Designed for equipment disconnect and isolation at the point of use, this switch is the right choice for reliable protection and quick maintenance in industrial panels. It’s also ideal for replacement projects and stocking spares to keep your BOM aligned with the original part number.

• Three-pole, 30 A, 240 V fusible safety switch delivers solid, dependable disconnect capability for demanding electrical systems.
• NEMA 1 enclosure suited for indoor, dry-location installations, helping keep the switch protected in controlled environments.
• Fusible design provides overcurrent protection and straightforward fuse replacement during routine maintenance or fault conditions.
• BOM-friendly part number D321N ensures seamless substitutions in replacement projects and when stocking spares.
• Optimized for downtime reduction by matching original hardware and reducing compatibility questions during repairs or upgrades.
• Reliable for panel installations as a dedicated equipment disconnect at the point of use in manufacturing, processing, and general industrial settings.

The D321N is a practical, ready-to-hold spare that aligns with standard electrical workflows. It’s the dependable choice when you need to isolate equipment safely, protect circuits, and maintain consistent BOMs across plant maintenance cycles.

If you’re unsure about fit or compatibility, AmpState is ready to help confirm the right part for your application. Message us and we’ll verify electrical fit and enclosure compatibility to ensure you get the exact square D part you need.

Key specifications

• Part Number: D321N
• Amperage: 30 A
• Poles: 3
• Voltage: 240 V
• Enclosure: NEMA 1
• Type: Fusible Safety Switch
• Manufacturer: Square D
• Availability: AmpState

In short, the Square D D321N 30A 3P 240V Safety Switch is a purpose-driven solution for safe, efficient equipment isolation at the point of use — with BOM alignment and reliable spare readiness that keeps your operations moving.