ST22L3S3AB Toggle Switch DPDT Equivalent & Substitute Parts

Part Overview

The ST22L3S3AB is a toggle switch manufactured by APEM Inc., featuring DPDT (Double Pole Double Throw) circuitry with On-Off-On switching function. This through-hole, right-angle mounted component is rated for 0.4VA at 20V AC/DC operation. The product is currently obsolete, making identification of functionally equivalent alternatives essential for design continuity and component sourcing in maintenance and production environments.

Substiute Parts

ST22L3S3AB

APEM Inc.In Stock: 751ST22L3S3AB Datasheet

Current PartRFQ

7203MD9ABE

C&KIn Stock: 11137203MD9ABE Datasheet

SimilarRFQ

E203MD1ABE

C&KIn Stock: 1225E203MD1ABE Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ST22L3S3AB is determined by strict alignment with the following critical parameters:

• Circuit configuration: DPDT
• Switch function: On-Off-On
• Current rating: 0.4VA (AC/DC)
• Voltage rating: 20V AC and 20V DC
• Mounting type: Through Hole, Right Angle
• Termination style: PC Pin
• Operating temperature range: -30°C to 85°C
• Electrical life: 40,000 Cycles

The identified substitute parts meet all mandatory electrical and mechanical parameters. Variations in actuator length, actuator material finish, packaging format, and ingress protection rating do not affect functional substitution within the specified electrical operating envelope.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts are manufactured by C&K and maintain active product status, ensuring ongoing availability and supply chain continuity compared to the obsolete ST22L3S3AB.

7203MD9ABE (C&K 7000 Series): This substitute maintains identical actuator length (6.86mm) to the original part, minimizing mechanical redesign requirements in panel-mounted applications. The part is ROHS3 compliant and features epoxy sealed terminals for enhanced environmental protection. Packaging is supplied in tray format.

E203MD1ABE (C&K E Series): This substitute provides enhanced ingress protection (IP57 - Dust Protected, Waterproof) and epoxy sealed terminals, suitable for applications requiring environmental sealing. The actuator length is 7.62mm, requiring verification of panel cutout and mechanical clearance in existing designs. The part is ROHS3 compliant and supplied in bulk packaging.

Both substitutes are REACH Affected, whereas the original part is REACH Unaffected. Selection should account for supply chain compliance requirements specific to the end application and geographic market.

Frequently Asked Questions (FAQ)

Q: Can 7203MD9ABE and E203MD1ABE be used interchangeably with ST22L3S3AB?

A: Both parts meet all mandatory electrical and mechanical substitution criteria: DPDT circuit, On-Off-On function, 0.4VA at 20V AC/DC rating, through-hole right-angle mounting, and PC pin termination. The primary difference is actuator length: 7203MD9ABE matches the original 6.86mm length, while E203MD1ABE is 7.62mm. Panel cutout dimensions and mechanical clearance must be verified for the E203MD1ABE variant.

Q: What is the difference between the two C&K substitutes?

A: 7203MD9ABE and E203MD1ABE differ in actuator length (6.86mm vs. 7.62mm), ingress protection rating (standard vs. IP57), packaging format (tray vs. bulk), and actuator material finish (chrome plated in both, but different series specifications). Both maintain identical electrical performance and operating parameters.

Q: Are there packaging considerations when selecting a substitute?

A: Yes. The original ST22L3S3AB is supplied in standard packaging. 7203MD9ABE is supplied in tray format, while E203MD1ABE is supplied in bulk format. Packaging selection should align with procurement, storage, and assembly process requirements.

Q: Does the actuator length difference affect electrical performance?

A: No. Actuator length affects only mechanical panel interface and operator feel. Electrical performance, switching characteristics, and rated capacity remain identical across all three parts.

Q: What compliance differences exist between the original and substitutes?

A: All three parts are ROHS3 compliant. The original ST22L3S3AB is REACH Unaffected, while both C&K substitutes are REACH Affected. Applications subject to REACH regulations must account for this classification difference in supply chain documentation.