Square D D221N 30A 2P 240V Safety Switch, NEMA 1, Fusible | AmpState

The Square D D221N 30A 2P 240V Safety Switch is a rugged indoor disconnect designed to reliably isolate equipment at the point of use. With a fusible design and a two‑pole configuration, this switch combines protection and control in a compact package, making it a smart choice for both new installations and retrofit projects where keeping the exact part number is important for maintenance planning.

Why this safety switch matters

• Consolidates power isolation and overcurrent protection in one durable unit, simplifying wiring and maintenance.
• Fusible design provides rapid, predictable protection and easy servicing when fuses are replaced or renewed.
• Preserves a consistent part number (D221N) for retrofit projects, reducing inventory confusion and downtime during replacements.
• Designed for indoor use with a NEMA 1 enclosure, suitable for clean, protected environments typically found in control rooms, machine rooms, and service areas.

Key specifications

• Brand: Square D
• Part Number: D221N
• Product Type: Safety Switch
• Amperage: 30 A
• Poles: 2
• Voltage: 240V
• Enclosure: NEMA 1 (indoor, basic protection)
• Fusible: Yes

Ideal applications

• Equipment disconnect at the point of use for motors, conveyors, pumps, or other electrical gear.
• Retrofit projects where maintaining the same part number simplifies spare parts planning and service visits.
• Maintenance planning scenarios that require predictable shutdowns with integrated fusing for added protection.

Who benefits from the D221N

• Facilities managers coordinating upgrades or replacements in protected indoor environments.
• Electrical contractors and maintenance electricians who value a reliable, consistent disconnect option.
• Operations teams seeking a straightforward, standards-based safety switch to minimize downtime during servicing.

Support and compatibility

AmpState offers this NEMA 1 fusible safety switch in the D221N model, with help available to confirm compatibility and fit. If you’re unsure about exact compatibility with your panel or circuit, you can message AmpState for guidance and to verify that the D221N matches your requirements.

Practical installation and usage tips

• Plan for indoor placement within reach of service personnel while ensuring clear access for safe operation.
• Pair with appropriate 240V circuits and wiring methods that match the 30A, 2‑pole configuration.
• When retrofitting, leverage the consistent D221N part number to simplify ordering and replacements down the line.
• Schedule routine inspections of the fusible elements and enclosure to maintain reliability and safe operation.