ASD21K22N Equivalent & Substitute Parts

Part Overview

The ASD21K22N is a keylock switch manufactured by IDEC, designed for panel-mounted applications requiring 2-position, 4PST switching functionality. This component operates at 110 VAC / 24 VDC with a 10A (AC) and 8A (DC) current rating. The part is classified as obsolete, making identification of compatible substitute components essential for system maintenance, repair, and redesign applications where continued supply cannot be guaranteed.

Substiute Parts

ASD21K22N

IDECIn Stock: 913ASD21K22N Datasheet

Current PartRFQ

ASD21K22NU

IDECIn Stock: 884ASD21K22NU Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ASD21K22N is determined by strict equivalence across the following critical parameters:

• Circuit Configuration: 4PST-2NO/2NC topology must be maintained
• Number of Positions: 2-position requirement
• Current Rating: Minimum 10A (AC) and 8A (DC)
• Voltage Rating: 110V (AC) and 24V (DC) compatibility
• Actuator Type: Flat key actuation
• Mounting Type: Panel mount with circular 30.50mm cutout
• Termination Style: Screw terminal connection
• Contact Material: Silver (Ag) contacts
• Environmental Rating: IP54 protection and operating temperature range -25°C to 50°C

The ASD21K22NU qualifies as a direct substitute based on manufacturer lineage (IDEC ASD21 base product family), maintained electrical specifications, and active product status ensuring continued availability.

Parameter Comparison

Engineering Selection Recommendations

The ASD21K22NU is the appropriate substitute for the obsolete ASD21K22N. Selection is based on:

• Product Status Alignment: The substitute maintains active product status, ensuring supply chain continuity and manufacturer support
• Regulatory Compliance: Both components meet ROHS3 compliance requirements, suitable for applications with environmental and regulatory constraints
• Manufacturer Continuity: Both parts belong to the IDEC ASD21 product family, confirming design and functional compatibility
• MSL Rating: Identical MSL 1 classification ensures equivalent handling and storage requirements

Frequently Asked Questions (FAQ)

Q: Can the ASD21K22NU directly replace the ASD21K22N in existing applications?

A: Yes. Both components share the same base product number (ASD21) and maintain equivalent electrical specifications, circuit configuration, and mechanical mounting characteristics. The substitute is designed for direct replacement in panel-mounted keylock switch applications.

Q: What is the primary advantage of using ASD21K22NU over the obsolete ASD21K22N?

A: The ASD21K22NU maintains active product status with IDEC, ensuring ongoing availability, manufacturer support, and supply chain reliability. The obsolete ASD21K22N faces potential discontinuation and sourcing limitations.

Q: Are there packaging differences between these components?

A: The ASD21K22N packaging specification is not detailed in available documentation. The ASD21K22NU is supplied in bulk packaging. Confirm packaging requirements with your procurement process.

Q: Do both components meet the same compliance standards?

A: Yes. Both the ASD21K22N and ASD21K22NU are ROHS3 compliant with MSL 1 (Unlimited) rating, meeting equivalent environmental and regulatory requirements.

Q: What electrical parameters must remain constant during substitution?

A: The following parameters are critical for substitution: 4PST-2NO/2NC circuit configuration, 2-position operation, 10A (AC) / 8A (DC) current rating, 110V (AC) / 24V (DC) voltage rating, flat key actuation, panel mount with 30.50mm circular cutout, and screw terminal termination.