CWSC21JFAFS Rocker Switch - Equivalent & Substitute Parts

Part Overview

The CWSC21JFAFS is a DPST rocker switch manufactured by NKK Switches, rated for 9A at 125V AC with LED green illumination. This panel-mount, snap-in switch features an illuminated concave actuator and is designed for on-off circuit control applications. The product is currently obsolete, making identification of compatible substitute parts essential for ongoing maintenance, repair, and new design implementations where equivalent functionality is required.

Substiute Parts

CWSC21JFAFS

NKK SwitchesIn Stock: 1032CWSC21JFAFS Datasheet

Current PartRFQ

CWSB21FAFF

NKK SwitchesIn Stock: 1189CWSB21FAFF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CWSC21JFAFS is determined by the following critical parameters:

• Circuit Configuration: Must be DPST to maintain dual-pole switching capability
• Current Rating: Must support minimum 9A AC
• Voltage Rating: Must support minimum 125V AC
• Mounting Type: Must be Panel Mount, Snap-In to ensure mechanical compatibility
• Panel Cutout Dimensions: Must match 19.20mm x 12.90mm rectangular cutout for direct panel integration
• Switch Function: Must provide On-Off functionality
• Mechanical Life: Must meet or exceed 30,000 cycles
• Electrical Life: Must meet or exceed 10,000 cycles

The CWSB21FAFF qualifies as a substitute part because it meets all critical electrical and mechanical parameters while maintaining identical panel mounting geometry and snap-in installation method.

Parameter Comparison

Engineering Selection Recommendations

The CWSB21FAFF is a functionally equivalent substitute for the obsolete CWSC21JFAFS based on matching electrical ratings, circuit configuration, and mechanical mounting specifications. Both parts maintain identical panel cutout dimensions and snap-in installation requirements, enabling direct mechanical replacement in existing panel designs.

Key considerations for selection:

Illumination Technology Difference: The CWSC21JFAFS uses LED illumination powered at 2.1 VDC, while the CWSB21FAFF uses neon illumination powered at 125 VAC. This difference requires evaluation of the existing illumination circuit design. If the panel design includes a dedicated 2.1 VDC illumination supply, additional circuit modification may be necessary to accommodate the 125 VAC neon illumination of the substitute part.

Termination Connector Size: The CWSC21JFAFS uses 0.110" (2.8mm) quick-connect terminals, while the CWSB21FAFF uses 0.187" (4.7mm) terminals. Wire harness and connector compatibility must be verified before substitution.

Compliance and Certification: The CWSB21FAFF carries cULus certification, which provides broader regulatory coverage compared to the UL certification of the main part. The substitute part also supports an extended operating temperature range of -20°C to 85°C, exceeding the -10°C to 50°C range of the original part.

Product Status: The CWSB21FAFF is in active production with confirmed inventory availability (1102 pieces), ensuring long-term supply continuity compared to the obsolete status of the CWSC21JFAFS.

Frequently Asked Questions (FAQ)

Q: Can the CWSB21FAFF be used as a direct drop-in replacement for the CWSC21JFAFS?

A: Mechanical and electrical substitution is possible due to matching DPST circuit configuration, 9A/125V ratings, and identical panel cutout dimensions. However, the different illumination technology (LED vs. neon) and termination connector sizes require circuit and harness evaluation before implementation.

Q: What is the primary difference between these two switch models?

A: The main differences are illumination type (LED powered at 2.1 VDC for the CWSC21JFAFS versus neon powered at 125 VAC for the CWSB21FAFF) and termination connector size (0.110" versus 0.187"). Both switches provide identical switching performance and mechanical compatibility.

Q: Are there any temperature rating differences I should consider?

A: Yes. The CWSC21JFAFS operates from -10°C to 50°C, while the CWSB21FAFF operates from -20°C to 85°C. The substitute part supports a wider temperature range, which may be advantageous in applications requiring extended environmental tolerance.

Q: What certifications apply to each part?

A: The CWSC21JFAFS carries UL certification. The CWSB21FAFF carries cULus certification, which includes both UL and CSA (Canadian Standards Association) approval, providing broader regulatory acceptance.

Q: Is the CWSB21FAFF currently available?

A: Yes. The CWSB21FAFF is in active production status with 1102 pieces in current inventory, ensuring availability for new designs and replacement applications.

Q: What packaging options are available for the substitute part?

A: The CWSB21FAFF is supplied in bulk packaging, compared to the standard packaging of the original part.