Equivalent & Substitute Parts for E105SF1AV2KE Toggle Switch

Part Overview

The E105SF1AV2KE is a toggle switch manufactured by C&K, featuring SPDT (Single Pole Double Throw) circuitry with a momentary-off-momentary (Mom-Off-Mom) switch function. This component is rated for 0.4VA at 20V AC/DC with through-hole, right-angle vertical mounting. The product is currently obsolete, necessitating identification of equivalent and substitute parts for ongoing applications and new designs.

Substiute Parts

E105SF1AV2KE

C&KIn Stock: 906E105SF1AV2KE Datasheet

Current PartRFQ

E105SF1AV2PE

C&KIn Stock: 1076E105SF1AV2PE Datasheet

DirectRFQ

A127P31D9AV2B

ElectroswitchIn Stock: 1127A127P31D9AV2B Datasheet

SimilarRFQ

A127S1D9AV2Q

ElectroswitchIn Stock: 1015A127S1D9AV2Q Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the E105SF1AV2KE is determined by the following critical parameters: circuit configuration (SPDT), switch function (Mom-Off-Mom), mounting type (through-hole right-angle vertical), termination style (PC pin), and actuator material (brass, chrome-plated). Parts are classified into two categories based on electrical rating compatibility:

Direct Equivalent Category: Parts maintaining identical or superior electrical ratings (current and voltage) with matching mechanical and functional specifications.

Similar Specification Category: Parts with different electrical ratings but identical mechanical mounting, circuit configuration, and switch function. These require application-level voltage and current verification.

Parameter Comparison

Engineering Selection Recommendations

E105SF1AV2PE (C&K): This part is the primary direct equivalent, maintaining identical electrical ratings (0.4VA, 20V AC/DC), mechanical configuration, and actuator specifications as the E105SF1AV2KE. The E105SF1AV2PE is currently active in production with RoHS compliance certification. The only functional difference is packaging format (bulk versus original packaging) and terminal sealing method (epoxy sealed versus ESD conductive bushing). This part is suitable for direct replacement in applications requiring the original electrical and mechanical specifications.

A127P31D9AV2B (Electroswitch): This substitute provides higher electrical ratings (0.5VA, 28V AC/DC) with extended operating temperature range (-30°C to 90°C) and increased electrical life (60,000 cycles). The actuator type differs (flatted versus standard round) and actuator length is shorter (11.38mm versus 12.70mm). This part is suitable for applications where higher voltage and current margins are acceptable and mechanical envelope constraints permit the shorter actuator length.

A127S1D9AV2Q (Electroswitch): This substitute provides significantly higher electrical ratings (6A, 125V AC/DC) with extended operating temperature range and increased electrical life (60,000 cycles). The actuator length is substantially shorter (10.41mm versus 12.70mm). This part is suitable only for applications where the higher electrical ratings are required and the reduced actuator length does not create mechanical interference.

All substitute parts maintain SPDT circuit configuration, Mom-Off-Mom switch function, through-hole right-angle vertical mounting, and PC pin termination, ensuring mechanical and functional compatibility within the specified parameter constraints.

Frequently Asked Questions (FAQ)

Q: Can E105SF1AV2PE be used as a direct replacement for E105SF1AV2KE?

A: Yes. E105SF1AV2PE maintains identical electrical ratings (0.4VA, 20V AC/DC), circuit configuration (SPDT), switch function (Mom-Off-Mom), mounting type (through-hole right-angle vertical), and actuator specifications (standard round, 12.70mm length). The primary differences are packaging format and terminal sealing method, which do not affect electrical or mechanical compatibility.

Q: What are the key differences between the C&K E105SF1AV2PE and Electroswitch A127P31D9AV2B?

A: The A127P31D9AV2B provides higher electrical ratings (0.5VA versus 0.4VA; 28V versus 20V), extended operating temperature range (90°C versus 85°C maximum), and increased electrical life (60,000 versus 40,000 cycles). The actuator type is flatted rather than standard round, and the actuator length is shorter (11.38mm versus 12.70mm). These differences require verification that the application can accommodate the higher ratings and shorter actuator length.

Q: When should A127S1D9AV2Q be selected over other substitutes?

A: A127S1D9AV2Q should be selected only when the application requires the significantly higher electrical ratings (6A, 125V AC/DC). The substantially shorter actuator length (10.41mm versus 12.70mm) may create mechanical constraints in panel-mounted applications. Verify that the application's electrical requirements justify the higher-rated component and that the reduced actuator length does not cause interference with surrounding components or panel geometry.

Q: Are all substitute parts RoHS compliant?

A: Yes. E105SF1AV2PE is RoHS compliant. A127P31D9AV2B and A127S1D9AV2Q are both RoHS compliant. The original E105SF1AV2KE is RoHS3 compliant. All parts meet applicable RoHS requirements.

Q: What is the impact of different actuator lengths on mechanical compatibility?

A: Actuator length affects panel cutout depth and operator reach. E105SF1AV2KE and E105SF1AV2PE both feature 12.70mm actuators. A127P31D9AV2B has an 11.38mm actuator (1.32mm shorter), and A127S1D9AV2Q has a 10.41mm actuator (2.29mm shorter). Verify that panel geometry and operator interface requirements can accommodate the reduced actuator length of substitute parts.

Q: Do the Electroswitch parts provide IP57 ingress protection equivalent to the original?

A: The A127P31D9AV2B and A127S1D9AV2Q specifications do not list ingress protection ratings. If IP57 dust and water protection is required for the application, E105SF1AV2PE is the appropriate substitute, as it maintains the IP57 specification of the original E105SF1AV2KE.