Equivalent & Substitute Parts for TE Connectivity A201SYCB Toggle Switch DPDT

Part Overview

The TE Connectivity A201SYCB is a toggle switch with DPDT (Double Pole Double Throw) configuration rated for 0.4VA at 20V AC/DC. This panel-mount switch features a standard round actuator with PC pin termination and epoxy sealed terminals. The part is classified as obsolete, necessitating identification of active equivalent and substitute components that maintain functional compatibility within specified electrical and mechanical parameters.

Substiute Parts

A201SYCB

TE Connectivity ALCOSWITCH SwitchesIn Stock: 796A201SYCB Datasheet

Current PartRFQ

2-1825138-4

TE Connectivity ALCOSWITCH SwitchesIn Stock: 18262-1825138-4 Datasheet

DirectRFQ

34ADP12B1M2QT

Grayhill Inc.In Stock: 87734ADP12B1M2QT Datasheet

SimilarRFQ

7201MDCBE

C&KIn Stock: 10937201MDCBE Datasheet

SimilarRFQ

A223M1CWCQ

ElectroswitchIn Stock: 767A223M1CWCQ Datasheet

SimilarRFQ

A223P31DCQ

ElectroswitchIn Stock: 861A223P31DCQ Datasheet

SimilarRFQ

A223S1YCB

ElectroswitchIn Stock: 870A223S1YCB Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the A201SYCB toggle switch is determined by the following critical parameters:

Electrical Compatibility Parameters:

• Circuit configuration (DPDT required)
• Switch function (On-On required)
• Current rating must equal or exceed 0.4VA
• Voltage rating must support minimum 20V AC and 20V DC operation
• Termination style (PC Pin required)

Mechanical Compatibility Parameters:

• Mounting type (Panel Mount required)
• Panel cutout dimensions (Circular 6.35mm Dia required)
• Bushing thread (1/4-40 required)
• Actuator type compatibility with panel assembly

Operational Parameters:

• Operating temperature range must encompass -20°C to 85°C minimum
• Electrical life cycle rating

Substitute parts are grouped into two categories:

Direct Equivalents: Parts maintaining identical electrical ratings (0.4VA at 20V) with matching mechanical specifications and enhanced product status (Active).

Functional Substitutes: Parts with higher electrical ratings (current and/or voltage) that operate within the original application parameters while providing upgraded performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation - Direct Equivalent:

The TE Connectivity 2-1825138-4 is the direct equivalent replacement for the A201SYCB. This part maintains identical electrical specifications (0.4VA at 20V AC/DC), mechanical configuration (Panel Mount, 1/4-40 bushing, 6.35mm circular cutout), and termination style (PC Pin). The 2-1825138-4 is currently in active production status with ROHS3 compliance, addressing the obsolescence of the original part. The actuator length (10.41mm) and operating temperature range (-30°C to 85°C) are identical to the main part.

Secondary Recommendation - Electrical Equivalent with Enhanced Performance:

The C&K 7201MDCBE provides electrical equivalence (0.4VA at 20V AC/DC) with identical mechanical mounting specifications. This part offers enhanced electrical life (100,000 cycles versus 6,000 cycles) and ROHS3 compliance. The actuator length differs at 6.86mm, requiring verification of panel assembly clearance. The operating temperature range extends to -30°C, providing broader environmental tolerance.

Functional Substitutes - Higher Electrical Ratings:

The Electroswitch A223S1YCB operates at 0.5VA and 28V, providing marginal current and voltage headroom while maintaining identical actuator length (10.41mm) and mechanical compatibility. This part is RoHS compliant with 60,000 cycle electrical life.

The Grayhill 34ADP12B1M2QT and Electroswitch A223M1CWCQ and A223P31DCQ provide significantly higher electrical ratings (5A to 6A at 125V AC) suitable for applications requiring performance margin beyond the original 0.4VA specification. These parts maintain DPDT On-On configuration and 1/4-40 bushing thread but feature reduced actuator lengths (5.08mm to 11.38mm) requiring panel assembly verification.

Compliance Consideration:

All recommended substitutes are RoHS compliant, addressing regulatory requirements that may supersede the non-compliant status of the original A201SYCB.

Frequently Asked Questions (FAQ)

Q: Can the TE Connectivity 2-1825138-4 directly replace the A201SYCB without modification?

A: Yes. The 2-1825138-4 maintains identical electrical ratings (0.4VA at 20V AC/DC), mechanical mounting configuration (Panel Mount with 1/4-40 bushing and 6.35mm circular cutout), actuator length (10.41mm), and PC pin termination. No circuit or panel modifications are required.

Q: What is the primary difference between the A201SYCB and its direct equivalent 2-1825138-4?

A: The primary difference is product status and compliance. The A201SYCB is obsolete and RoHS non-compliant, while the 2-1825138-4 is in active production with ROHS3 compliance. Electrical and mechanical specifications are identical.

Q: Can I use the C&K 7201MDCBE as a substitute?

A: The 7201MDCBE is electrically equivalent (0.4VA at 20V AC/DC) and mechanically compatible with identical mounting specifications. However, the actuator length is 6.86mm compared to the original 10.41mm. Panel assembly clearance and actuator engagement depth must be verified before substitution.

Q: What are the limitations of using higher-rated switches like the Grayhill 34ADP12B1M2QT or Electroswitch A223M1CWCQ?

A: These parts provide significantly higher electrical ratings (5A to 6A at 125V AC) but feature reduced actuator lengths (5.08mm) compared to the original 10.41mm. Panel assembly compatibility, including actuator protrusion and engagement characteristics, must be verified. These parts are suitable only for applications where the original electrical specifications are insufficient.

Q: Are all substitute parts RoHS compliant?

A: Yes. All recommended substitute parts are RoHS compliant (either RoHS or ROHS3 certified), whereas the original A201SYCB is RoHS non-compliant. This addresses regulatory requirements for new designs and procurement.

Q: What is the significance of electrical life cycle ratings in these substitutes?

A: The original A201SYCB is rated for 6,000 cycles. The C&K 7201MDCBE provides 100,000 cycles, and Electroswitch parts provide 60,000 cycles. Higher cycle ratings indicate extended operational life and reduced maintenance frequency in applications with frequent switching operations.

Q: Do all substitutes maintain the same panel cutout dimensions?

A: The direct equivalent 2-1825138-4 and C&K 7201MDCBE maintain the 6.35mm circular cutout specification. The Electroswitch parts (A223S1YCB, A223M1CWCQ, A223P31DCQ) do not specify panel cutout dimensions in the provided data, requiring verification with manufacturer documentation before substitution.

Q: Can I substitute based on DPDT and On-On configuration alone?

A: No. DPDT and On-On configuration are necessary but not sufficient for substitution. Electrical ratings (current and voltage), mechanical mounting specifications (panel cutout, bushing thread, actuator length), and termination style must all be verified for compatibility with the original application circuit and panel assembly.

Q: What should I verify before implementing a substitute part?

A: Verify the following: (1) Electrical ratings meet or exceed application requirements; (2) Panel cutout dimensions and bushing thread match the existing assembly; (3) Actuator length provides appropriate protrusion for user interface; (4) Operating temperature range encompasses the application environment; (5) Termination style is compatible with existing PCB or wiring; (6) Compliance certifications meet current regulatory requirements.