C&K 7103SYCME Toggle Switch SPDT Equivalent & Substitute Parts

Part Overview

The C&K 7103SYCME is a panel-mount toggle switch with SPDT (Single Pole Double Throw) circuit configuration, rated for 5A at 120V AC and 28V DC. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new design implementations. The 7103SYCME belongs to the C&K 7000 series and features epoxy-sealed terminals with a standard round actuator and PC pin termination.

Substiute Parts

7103SYCME

C&KIn Stock: 8857103SYCME Datasheet

Current PartRFQ

7103SYCSE

C&KIn Stock: 9047103SYCSE Datasheet

DirectRFQ

A121S1DCQ

ElectroswitchIn Stock: 1105A121S1DCQ Datasheet

SimilarRFQ

A121S1YCQ

ElectroswitchIn Stock: 1166A121S1YCQ Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 7103SYCME are categorized based on electrical and mechanical compatibility within the following parameters:

Primary Compatibility Criteria:

• Circuit configuration: SPDT
• Mounting type: Panel Mount
• Termination style: PC Pin
• Bushing thread: 1/4-40
• Actuator type: Standard Round
• Panel cutout dimensions: Circular - 6.35mm Dia

Direct Manufacturer Substitute: The 7103SYCSE from C&K maintains identical electrical and mechanical specifications to the 7103SYCME, with the primary distinction being active product status and RoHS compliance.

Cross-Manufacturer Substitutes: The Electroswitch A121S1DCQ and A121S1YCQ are classified as similar substitutes. These parts maintain SPDT circuit configuration, panel mount design, PC pin termination, and 1/4-40 bushing thread. Electrical ratings differ within acceptable parameters: current rating increases to 6A, AC voltage rating increases to 125V, and operating temperature range extends to -30°C to 90°C. Electrical life is rated at 60,000 cycles versus 40,000 cycles for the original part.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Preferred): The C&K 7103SYCSE is the recommended direct substitute for the obsolete 7103SYCME. Both parts maintain identical electrical and mechanical specifications. The 7103SYCSE offers the advantage of active product status and RoHS compliance, making it suitable for new designs and systems requiring regulatory compliance.

For Cross-Manufacturer Substitution: The Electroswitch A121S1DCQ and A121S1YCQ are suitable alternatives when C&K 7103SYCSE availability is constrained. These parts provide enhanced electrical ratings (6A current, 125V AC) and extended electrical life (60,000 cycles). The switch function differs from the original (On-On versus On-Off-On), which must be evaluated against circuit requirements. Both Electroswitch parts are RoHS compliant and actively manufactured.

Compliance Considerations: Applications requiring RoHS compliance should utilize the 7103SYCSE, A121S1DCQ, or A121S1YCQ. The original 7103SYCME is RoHS non-compliant and unsuitable for new designs subject to RoHS regulations.

Frequently Asked Questions (FAQ)

Q: Can the 7103SYCSE directly replace the 7103SYCME without circuit modification? A: Yes. The 7103SYCSE maintains identical electrical ratings (5A, 120V AC, 28V DC), circuit configuration (SPDT), switch function (On-Off-On), and mechanical specifications (panel mount, PC pin termination, 1/4-40 bushing thread). No circuit modifications are required.

Q: What is the primary difference between the 7103SYCME and 7103SYCSE? A: The 7103SYCSE is the active production equivalent with RoHS compliance. The 7103SYCME is obsolete and RoHS non-compliant. Electrical and mechanical specifications are identical.

Q: Are the Electroswitch A121S1DCQ and A121S1YCQ direct replacements? A: These are cross-manufacturer substitutes with compatible mechanical interfaces but different electrical characteristics. Current rating increases to 6A, AC voltage rating increases to 125V, and switch function changes from On-Off-On to On-On. Circuit requirements must be evaluated to confirm suitability.

Q: What is the difference between the A121S1DCQ and A121S1YCQ? A: Both parts are electrically and mechanically identical. The designation difference reflects internal manufacturing or configuration variations within the Electroswitch A121S1 series. Substitution between these parts is interchangeable.

Q: Does the 0.26mm difference in actuator length (10.67mm versus 10.41mm) affect panel mounting? A: The actuator length difference is minor and does not affect panel cutout compatibility. Both the C&K and Electroswitch parts utilize identical panel cutout dimensions (circular 6.35mm diameter) and bushing thread (1/4-40).

Q: Are all substitute parts rated for the same operating temperature range? A: No. The C&K parts (7103SYCME and 7103SYCSE) are rated -30°C to 85°C. The Electroswitch parts (A121S1DCQ and A121S1YCQ) are rated -30°C to 90°C, providing a 5°C extended upper temperature limit.

Q: Which substitute part should be selected for new designs? A: The C&K 7103SYCSE is recommended for new designs requiring direct electrical and functional equivalence. The Electroswitch A121S1DCQ or A121S1YCQ are suitable alternatives when enhanced electrical ratings or extended electrical life are beneficial to system performance.