Equivalent & Substitute Parts for C&K 7105SD9AV2LE Toggle Switch

Part Overview

The C&K 7105SD9AV2LE is a toggle switch with SPDT (Single Pole Double Throw) configuration, rated for 5A at 120V AC and 28V DC. This component features a momentary-off-momentary (Mom-Off-Mom) switch function with through-hole, right-angle vertical mounting. The part is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications.

Substiute Parts

7105SD9AV2LE

C&KIn Stock: 9927105SD9AV2LE Datasheet

Current PartRFQ

7105SD9AV2RE

C&KIn Stock: 9577105SD9AV2RE Datasheet

DirectRFQ

A127P31D9AV2B

ElectroswitchIn Stock: 1127A127P31D9AV2B Datasheet

SimilarRFQ

A127S1D9AV2Q

ElectroswitchIn Stock: 1015A127S1D9AV2Q Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 7105SD9AV2LE is determined by the following critical parameters:

• Circuit Configuration: Must be SPDT
• Switch Function: Must be Mom-Off-Mom
• Mounting Type: Must be Through Hole, Right Angle, Vertical
• Termination Style: Must be PC Pin
• Electrical Ratings: Current and voltage ratings must meet or exceed the original specification
• Physical Compatibility: Actuator type and length must accommodate the original mechanical interface

Two substitute categories are identified:

Direct Substitute (Identical Electrical and Mechanical Specifications)

• 7105SD9AV2RE: Same manufacturer (C&K), same series (7000), identical electrical and mechanical parameters with active product status

Similar Substitutes (Compatible Electrical and Mechanical Parameters with Variations)

• A127S1D9AV2Q (Electroswitch): Meets or exceeds electrical ratings (6A at 125V AC), maintains SPDT Mom-Off-Mom configuration, through-hole vertical mounting with PC pin termination
• A127P31D9AV2B (Electroswitch): Maintains SPDT Mom-Off-Mom configuration and through-hole vertical mounting; operates at lower current rating (0.5VA at 28V) suitable for lower-power applications

Parameter Comparison

Engineering Selection Recommendations

7105SD9AV2RE is the primary substitute for the obsolete 7105SD9AV2LE. Both parts are from the C&K 7000 series with identical electrical specifications (5A at 120V AC, 28V DC), mechanical configuration, and operating temperature range. The 7105SD9AV2RE maintains active product status and ROHS3 compliance, ensuring long-term availability and regulatory alignment.

A127S1D9AV2Q (Electroswitch) is suitable for applications requiring equal or greater electrical capacity. This part exceeds the original current rating (6A versus 5A) and AC voltage rating (125V versus 120V), with extended electrical life (60,000 cycles versus 40,000 cycles) and expanded operating temperature range (-30°C to 90°C). The standard round actuator maintains mechanical compatibility.

A127P31D9AV2B (Electroswitch) is applicable only to low-power applications operating at 28V DC or lower. The reduced current rating (0.5VA) makes this part unsuitable for the original 5A specification. The flatted actuator differs from the standard round type, requiring mechanical interface assessment.

Frequently Asked Questions (FAQ)

Q: Can the 7105SD9AV2RE directly replace the 7105SD9AV2LE without circuit modification?

A: Yes. The 7105SD9AV2RE is electrically and mechanically identical to the 7105SD9AV2LE, with matching current ratings (5A AC/DC), voltage ratings (120V AC, 28V DC), SPDT Mom-Off-Mom configuration, and through-hole vertical mounting. No circuit redesign is required.

Q: What is the key difference between the direct substitute and similar substitutes?

A: The 7105SD9AV2RE is from the same manufacturer and series with identical specifications. The Electroswitch parts (A127S1D9AV2Q and A127P31D9AV2B) are from a different manufacturer and series with variations in current rating, voltage rating, actuator type, and electrical life. Selection depends on application requirements.

Q: Can A127S1D9AV2Q be used in place of the original part?

A: Yes, for applications requiring the original 5A at 120V AC specification. The A127S1D9AV2Q exceeds these ratings (6A at 125V AC) and maintains SPDT Mom-Off-Mom configuration with through-hole vertical mounting. The higher electrical life (60,000 cycles) and extended temperature range provide additional margin.

Q: Is A127P31D9AV2B compatible with the original circuit?

A: No. The A127P31D9AV2B is rated for 0.5VA at 28V, which is insufficient for the original 5A at 120V AC specification. This part is suitable only for low-power 28V DC applications.

Q: What packaging options are available?

A: The 7105SD9AV2LE is supplied in standard packaging. The 7105SD9AV2RE and Electroswitch substitutes are available in bulk packaging.

Q: Are all substitute parts RoHS compliant?

A: Yes. The 7105SD9AV2RE maintains ROHS3 compliance. The Electroswitch parts (A127S1D9AV2Q and A127P31D9AV2B) are RoHS compliant.