C&K 7105L1YCME Toggle Switch SPDT Equivalent & Substitute Parts

Part Overview

The C&K 7105L1YCME 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 switch features a Mom-Off-Mom (momentary-off-momentary) function with epoxy-sealed PC pin terminals and operates across a temperature range of -30°C to 85°C.

Substiute Parts

7105L1YCME

C&KIn Stock: 9647105L1YCME Datasheet

Current PartRFQ

7105L1YCSE

C&KIn Stock: 8087105L1YCSE Datasheet

DirectRFQ

100SP4T1B1M2QEH

E-SwitchIn Stock: 1017100SP4T1B1M2QEH Datasheet

SimilarRFQ

100SP4T3B1M2RE

E-SwitchIn Stock: 1058100SP4T3B1M2RE Datasheet

SimilarRFQ

3-1825137-6

TE Connectivity ALCOSWITCH SwitchesIn Stock: 15773-1825137-6 Datasheet

SimilarRFQ

34ASP41B1M2QT

Grayhill Inc.In Stock: 112534ASP41B1M2QT Datasheet

SimilarRFQ

34ASP46T6M2QT

Grayhill Inc.In Stock: 103234ASP46T6M2QT Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

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

• Circuit Configuration: SPDT (mandatory match)
• Switch Function: Mom-Off-Mom (mandatory match)
• Mounting Type: Panel Mount (mandatory match)
• Panel Cutout Dimensions: Circular - 6.35mm Dia (mandatory match)
• Bushing Thread: 1/4-40 (mandatory match)
• Termination Style: PC Pin (mandatory match)
• Operating Temperature Range: -30°C to 85°C (mandatory match)

Substitute parts are grouped into two categories:

Direct Equivalent (Full Electrical Match):

• 7105L1YCSE (C&K): Identical electrical specifications with active product status

Functional Equivalents (Electrical Compatibility with Parameter Variations):

• 100SP4T1B1M2QEH (E-Switch): Matches all critical parameters; actuator length differs (10.41mm vs 16.26mm)
• 34ASP41B1M2QT (Grayhill Inc.): Matches all critical parameters; voltage rating AC is 125V (exceeds 120V requirement); actuator length differs (10.41mm vs 16.26mm)
• 34ASP46T6M2QT (Grayhill Inc.): Matches all critical parameters; voltage rating AC is 125V; actuator type is flatted; actuator length differs (11.43mm vs 16.26mm)

Limited Compatibility (Reduced Electrical Rating):

• 100SP4T3B1M2RE (E-Switch): Current rating reduced to 0.4VA; voltage ratings reduced to 20V AC/DC
• 3-1825137-6 (TE Connectivity ALCOSWITCH Switches): Current rating reduced to 0.4VA; voltage ratings reduced to 20V AC/DC; electrical life reduced to 6,000 cycles

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: 7105L1YCSE (C&K)

The C&K 7105L1YCSE is the direct equivalent replacement for the obsolete 7105L1YCME. It maintains identical electrical specifications (5A at 120V AC / 28V DC), circuit configuration (SPDT Mom-Off-Mom), and mechanical interface (panel mount with 1/4-40 bushing thread). The part carries active product status, ensuring long-term availability. ROHS3 compliance is maintained. The only difference is REACH Affected status versus REACH Unaffected on the original part.

Secondary Recommendations: E-Switch and Grayhill Inc. Alternatives

For applications where the longer 16.26mm actuator length of the original part is not a design constraint, the following active parts provide full electrical equivalence:

• 100SP4T1B1M2QEH (E-Switch): Maintains 5A/120V AC electrical rating with 10.41mm actuator length. ROHS3 compliant, REACH unaffected.
• 34ASP41B1M2QT (Grayhill Inc.): Maintains 5A rating with 125V AC capability (exceeds 120V requirement). 10.41mm actuator length. ROHS3 compliant, REACH unaffected.
• 34ASP46T6M2QT (Grayhill Inc.): Maintains 5A rating with 125V AC capability. Features flatted actuator type at 11.43mm length. ROHS3 compliant, REACH unaffected.

Not Recommended for Direct Substitution: Reduced-Rating Parts

The 100SP4T3B1M2RE (E-Switch) and 3-1825137-6 (TE Connectivity ALCOSWITCH Switches) feature reduced current ratings (0.4VA) and voltage ratings (20V AC/DC). These parts are suitable only for applications with lower electrical requirements than the original 5A/120V specification. The 3-1825137-6 additionally exhibits reduced electrical life (6,000 cycles versus 40,000 cycles).

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a different actuator length?

A: Actuator length affects panel ergonomics and operator interface feel but does not impact electrical function. Substitutes with shorter actuators (10.41mm to 13.97mm versus 16.26mm) are electrically compatible. Panel cutout dimensions remain identical (6.35mm circular), and bushing thread specifications (1/4-40) are unchanged. Mechanical fit and user interaction characteristics may differ.

Q: What is the difference between the main part and 7105L1YCSE?

A: The 7105L1YCSE is functionally identical to the 7105L1YCME with one regulatory difference: REACH Affected status versus REACH Unaffected. Both maintain SPDT Mom-Off-Mom configuration, 5A/120V AC / 28V DC ratings, and 40,000-cycle electrical life. The 7105L1YCSE carries active product status, ensuring availability.

Q: Why do some substitute parts have 125V AC ratings instead of 120V?

A: The Grayhill Inc. parts (34ASP41B1M2QT and 34ASP46T6M2QT) are rated for 125V AC, which exceeds the 120V requirement of the original part. This higher rating provides additional safety margin and is compatible with 120V AC applications. DC ratings remain at 28V, matching the original specification.

Q: Are the reduced-rating parts (100SP4T3B1M2RE and 3-1825137-6) suitable replacements?

A: These parts are electrically incompatible with the original 7105L1YCME for applications requiring 5A at 120V AC. They are rated for only 0.4VA at 20V AC/DC. Use these parts only in applications with lower electrical requirements. The 3-1825137-6 also exhibits reduced electrical life (6,000 cycles versus 40,000 cycles).

Q: What compliance certifications should I verify for my application?

A: All substitute parts maintain ROHS3 compliance or equivalent RoHS compliance. REACH status varies: most parts are REACH Unaffected, while 7105L1YCSE and 3-1825137-6 are REACH Affected. Verify REACH compliance requirements for your specific application and supply chain.

Q: Does panel cutout dimension compatibility guarantee mechanical fit?

A: Yes. All substitute parts feature identical panel cutout dimensions (Circular - 6.35mm Dia) and bushing thread specifications (1/4-40). Mechanical fit to the panel is guaranteed. Actuator length differences affect operator interface only, not mounting compatibility.