C&K 7105SH3CME Toggle Switch SPDT Equivalent & Substitute Parts

Part Overview

The C&K 7105SH3CME is a panel-mount toggle switch with SPDT (Single Pole Double Throw) circuit configuration, rated for 5A at 120V AC and 28V DC. This component operates in a Mom-Off-Mom (momentary-off-momentary) function with a 10.16mm round actuator and PC pin termination. The part is classified as obsolete, necessitating identification of active equivalent and substitute components that maintain functional compatibility within the specified electrical and mechanical parameters.

Substiute Parts

7105SH3CME

C&KIn Stock: 7047105SH3CME Datasheet

Current PartRFQ

7105SH3CSE

C&KIn Stock: 11937105SH3CSE Datasheet

DirectRFQ

A127L21HCQ

ElectroswitchIn Stock: 957A127L21HCQ Datasheet

SimilarRFQ

MTA106GPC

TE Connectivity ALCOSWITCH SwitchesIn Stock: 825MTA106GPC Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 7105SH3CME is determined by strict equivalence across the following critical parameters:

Primary Compatibility Criteria:

• Circuit configuration (SPDT)
• Switch function (Mom-Off-Mom)
• Mounting type (Panel Mount)
• Termination style (PC Pin)
• Bushing thread specification (1/4-40)
• Actuator type (Standard Round)

Electrical Compatibility Criteria:

• Current rating must equal or exceed 5A
• AC voltage rating must equal or exceed 120V
• DC voltage rating must equal or exceed 28V

Mechanical Compatibility Criteria:

• Panel cutout dimensions must accommodate 6.35mm circular opening
• Actuator length variation acceptable within panel assembly constraints

The 7105SH3CSE (C&K, Active) qualifies as a direct equivalent, maintaining identical electrical and mechanical specifications while offering improved compliance status. The A127L21HCQ (Electroswitch) and MTA106GPC (TE Connectivity) qualify as functional substitutes with elevated electrical ratings and maintained core parameters, though with minor variations in actuator length and temperature range.

Parameter Comparison

Engineering Selection Recommendations

7105SH3CSE (C&K) - Direct Equivalent: This part maintains identical electrical and mechanical specifications to the 7105SH3CME while offering active product status and RoHS compliance. Selection of this component eliminates obsolescence risk and satisfies modern regulatory requirements without design modification.

A127L21HCQ (Electroswitch) - Functional Substitute: This component exceeds the electrical requirements of the original part (6A vs. 5A current rating, 125V vs. 120V AC rating) and provides extended electrical life (60,000 vs. 40,000 cycles). The actuator length of 13.97mm represents a 3.81mm increase from the original specification. This substitute is suitable for applications where panel depth accommodates the longer actuator and where elevated electrical ratings provide design margin.

MTA106GPC (TE Connectivity ALCOSWITCH) - Functional Substitute: This component provides elevated AC current rating (6A) while maintaining DC specifications. The actuator length of 10.49mm is within 0.33mm of the original specification. Operating temperature range is reduced to -20°C to 80°C. This substitute is suitable for applications operating within the specified temperature envelope and where AC current margin is beneficial.

Frequently Asked Questions (FAQ)

Q: Can the 7105SH3CSE directly replace the 7105SH3CME without design changes?

A: Yes. The 7105SH3CSE maintains identical electrical ratings (5A, 120V AC, 28V DC), circuit configuration (SPDT), switch function (Mom-Off-Mom), mounting type (Panel Mount), actuator dimensions (10.16mm), and termination style (PC Pin). No design modification is required.

Q: What are the key differences between the A127L21HCQ and the original 7105SH3CME?

A: The A127L21HCQ provides higher current capacity (6A vs. 5A), slightly elevated AC voltage rating (125V vs. 120V), extended electrical life (60,000 vs. 40,000 cycles), and a longer actuator (13.97mm vs. 10.16mm). All other parameters remain equivalent. Panel depth must accommodate the 3.81mm actuator length increase.

Q: Is the MTA106GPC suitable for DC applications?

A: The MTA106GPC is rated for 4A DC, which is below the original 5A DC specification. For applications requiring 5A DC operation, this substitute is not appropriate. For applications requiring 4A DC or less, this component is suitable.

Q: What is the impact of RoHS compliance on substitute selection?

A: The 7105SH3CSE and A127L21HCQ are RoHS compliant, meeting modern regulatory requirements for new designs and procurement. The MTA106GPC is RoHS non-compliant. Selection should align with applicable regulatory and customer requirements.

Q: Can the A127L21HCQ be used in applications with temperature requirements below -20°C?

A: No. The A127L21HCQ operating temperature range is -30°C to 90°C, which does not extend below -20°C. For applications requiring operation at -30°C, the 7105SH3CSE or 7105SH3CME must be selected.

Q: Are all substitute parts available in the same packaging format?

A: The 7105SH3CME and 7105SH3CSE packaging information is not specified in the provided data. The A127L21HCQ and MTA106GPC are supplied in Bulk packaging. Packaging compatibility should be verified with component suppliers.