A205SYCB Toggle Switch DPDT Equivalent & Substitute Parts

Part Overview

The A205SYCB is a DPDT (Double Pole Double Throw) toggle switch manufactured by TE Connectivity ALCOSWITCH Switches, designed for panel mount applications with a rated capacity of 0.4VA at 20V. This component features a momentary-off-momentary (Mom-Off-Mom) switch function with PC pin termination and epoxy sealed terminals.

The A205SYCB is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure component availability, and support ongoing production and maintenance requirements for systems utilizing this switch configuration.

Substiute Parts

A205SYCB

TE Connectivity ALCOSWITCH SwitchesIn Stock: 882A205SYCB Datasheet

Current PartRFQ

7205SYCQE

C&KIn Stock: 9767205SYCQE Datasheet

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A227S1CWCB

ElectroswitchIn Stock: 1149A227S1CWCB Datasheet

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A227S1YCB

ElectroswitchIn Stock: 1134A227S1YCB Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the A205SYCB toggle switch is determined by the following critical parameters:

Mechanical Compatibility:

• Circuit configuration (DPDT)
• Switch function (Mom-Off-Mom)
• Mounting type (Panel Mount)
• Actuator type (Standard Round)
• Panel cutout dimensions (Circular - 6.35mm Dia)
• Bushing thread (1/4-40)
• Termination style (PC Pin)

Electrical Compatibility:

• Voltage ratings must equal or exceed the original specification (20V AC/DC minimum)
• Current rating must equal or exceed the original specification (0.4VA minimum)

Environmental Compatibility:

• Operating temperature range must encompass or exceed the original range (-20°C to 85°C)

The substitute parts listed below satisfy these mechanical and electrical compatibility requirements while offering enhanced performance characteristics such as higher current ratings, improved electrical life, and active product status.

Parameter Comparison

Engineering Selection Recommendations

7205SYCQE (C&K): This substitute provides the highest performance margin with 5A current capacity and 120V AC rating. The part is active and ROHS3 compliant, supporting modern regulatory requirements. The extended electrical life of 40,000 cycles and broader operating temperature range (-30°C to 85°C) exceed the original specification. The 0.26mm increase in actuator length (10.67mm versus 10.41mm) is within typical mechanical tolerance for panel mount applications. This option is suitable for applications requiring enhanced reliability and regulatory compliance.

A227S1CWCB (Electroswitch): This substitute offers electrical ratings (0.5VA at 28V) that exceed the original specification with minimal margin. The part is active and RoHS compliant. Electrical life of 60,000 cycles provides significant improvement over the original 6,000 cycles. Operating temperature range extends to 90°C, exceeding the original upper limit. Ingress protection is rated as Splash Proof, providing enhanced environmental protection. Actuator length matches the original specification exactly at 10.41mm. Panel cutout dimensions are not specified in available documentation.

A227S1YCB (Electroswitch): This substitute is functionally identical to A227S1CWCB with equivalent electrical ratings (0.5VA at 28V), active product status, and RoHS compliance. Electrical life of 60,000 cycles and operating temperature range of -30°C to 90°C match the A227S1CWCB specification. Actuator length matches the original at 10.41mm. Ingress protection specification is not provided. Panel cutout dimensions are not specified in available documentation.

All three substitute parts satisfy the mechanical and electrical compatibility requirements for the A205SYCB. Selection should be based on specific application requirements regarding current capacity, voltage rating, environmental protection, and regulatory compliance needs.

Frequently Asked Questions (FAQ)

Q: Can the 7205SYCQE substitute for the A205SYCB in all applications?

A: The 7205SYCQE satisfies all mechanical compatibility requirements (DPDT circuit, Mom-Off-Mom function, panel mount configuration, PC pin termination, 1/4-40 bushing thread, and 6.35mm circular panel cutout). Electrically, the 5A rating and 120V AC specification exceed the original 0.4VA at 20V requirement. However, applications with strict space constraints or specific actuator length requirements should note the 0.26mm difference in actuator length (10.67mm versus 10.41mm).

Q: What is the difference between A227S1CWCB and A227S1YCB?

A: Both parts are manufactured by Electroswitch with identical electrical specifications (0.5VA at 28V AC/DC), mechanical configuration (DPDT, Mom-Off-Mom, panel mount), and performance characteristics (60,000 cycle electrical life, -30°C to 90°C operating range, 10.41mm actuator length). The primary documented difference is that A227S1CWCB includes Splash Proof ingress protection, while A227S1YCB does not specify ingress protection rating.

Q: Are the substitute parts panel mount compatible with the original A205SYCB mounting?

A: All substitute parts are panel mount configuration with 1/4-40 bushing thread matching the original specification. The 7205SYCQE and A205SYCB both specify circular 6.35mm diameter panel cutout dimensions. The Electroswitch parts (A227S1CWCB and A227S1YCB) do not provide panel cutout dimension specifications in available documentation. Mechanical verification is required for these parts prior to installation.

Q: Why is the A205SYCB classified as obsolete?

A: The A205SYCB is listed as obsolete by TE Connectivity ALCOSWITCH Switches. The substitute parts listed are all active products from alternative manufacturers, providing equivalent or enhanced functionality with current production support and regulatory compliance.

Q: Do the substitute parts meet current RoHS requirements?

A: The 7205SYCQE is ROHS3 compliant. Both Electroswitch parts (A227S1CWCB and A227S1YCB) are RoHS compliant. The original A205SYCB is RoHS non-compliant. Applications subject to RoHS regulations should select from the compliant substitute options.

Q: What is the electrical life improvement provided by the substitute parts?

A: The original A205SYCB specifies 6,000 electrical cycles. The 7205SYCQE provides 40,000 cycles (6.7x improvement). Both Electroswitch parts provide 60,000 cycles (10x improvement). Extended electrical life indicates enhanced durability and longer operational service intervals.

Q: Are there packaging differences between the main part and substitutes?

A: The A205SYCB packaging is listed as dash (unspecified). The 7205SYCQE is packaged in bulk. Both Electroswitch parts (A227S1CWCB and A227S1YCB) are packaged in bulk. Packaging format may affect procurement quantities and handling procedures.