Square D D223N 100A 2P 240V Safety Switch, NEMA 1, Fusible | AmpState

The Square D D223N 100A 2P 240V Safety Switch is engineered for reliable equipment disconnect and precise isolation at the point of use. With a 2-pole design delivering 100 amps at 240 volts, this fusible switch provides targeted protection and a clear, immediate path to shut down power during maintenance or retrofit work.

Designed to stay consistent across service intervals, the D223N is a dependable choice when part numbers must remain stable. This makes it particularly valuable for retrofit projects, long-term maintenance planning, and scenarios where replacement parts need to fit into an established electrical layout without reengineering the enclosure or wiring diagrams.

Key benefits

• Clear point-of-use disconnection: Safe, immediate isolation for servicing equipment or performing electrical maintenance.
• Fusible protection: Field-selectable fuse protection to match the load requirements and coordination with upstream protection.
• Compact 2-pole design: Efficiently interrupts both hot lines in a 240V circuit while keeping wiring simple and accessible.
• NEMA 1 enclosure: Indoor-rated housing designed to protect the switch and wiring in typical non-hazardous environments.
• Particular fit for retrofit: Keeps your existing part number strategy intact, reducing documentation and installation adjustments.

Specifications at a glance

• Manufacturer: Square D
• Part Number: D223N
• Type: Safety Switch (fusible)
• Amperage: 100 A
• Poles: 2
• Voltage: 240 V
• Enclosure: NEMA 1

Availability note: AmpState carries the D223N, with support to verify fit and compatibility for your specific installation. If you’re unsure whether this exact part matches your equipment, send a message and we’ll help confirm the correct fit and any necessary accessories.

Ideal use cases

• Maintenance shutdowns for motors, conveyors, or control cabinets that require a reliable, code-compliant disconnect.
• Retrofit projects where you must maintain the same part number for interchangeability and documentation consistency.
• Indoor electrical installations that benefit from a straightforward, fusible safety switch with two poles in a compact enclosure.
• Plans that prioritize localized isolation at the point of use to simplify sequencing and lockout/tagout procedures.

Practical tips for installation and care

• Pair the D223N with compatible fusible links sized for the load to ensure coordinated protection.
• Double-check mounting to meet the enclosure’s NEMA 1 requirements and maintain clear access for safe operation.
• During maintenance, verify the fuses are in good condition and replace only with the same current rating and type to preserve protection coordination.
• Keep the part number consistent in your maintenance logs to simplify future replacements and service planning.

In short, the Square D D223N 100A 2P 240V Safety Switch is a purpose-built solution for dependable, point-of-use isolation. Its fusible design, 2-pole, 240V capability, and NEMA 1 enclosure make it a practical choice for retrofit projects, routine maintenance, and installations where staying with a known part number matters. If you need help confirming compatibility or arranging purchase through AmpState, reach out—we’re ready to assist with accurate fit and delivery timelines.