C&K 7101SYA3LE Toggle Switch SPDT Equivalent & Substitute Parts

Part Overview

The C&K 7101SYA3LE is a panel-mount toggle switch with SPDT (Single Pole Double Throw) 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 designs. The switch features epoxy-sealed terminals, a standard round actuator, and PC pin termination suitable for industrial control applications.

Substiute Parts

7101SYA3LE

C&KIn Stock: 12597101SYA3LE Datasheet

Current PartRFQ

7101SYA3RE

C&KIn Stock: 8167101SYA3RE Datasheet

DirectRFQ

A123S1YAG

ElectroswitchIn Stock: 848A123S1YAG Datasheet

SimilarRFQ

A123S1YAQ

ElectroswitchIn Stock: 986A123S1YAQ Datasheet

SimilarRFQ

A123S1YAQP

ElectroswitchIn Stock: 1147A123S1YAQP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

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

• Circuit Configuration: SPDT (required match)
• Switch Function: On-On (required match)
• Mounting Type: Panel Mount, Right Angle (required match)
• Termination Style: PC Pin (required match)
• Bushing Thread: 1/4-40 (required match)
• Current Rating: Minimum 5A (AC/DC)
• Voltage Rating - AC: Minimum 120V
• Voltage Rating - DC: Minimum 28V
• Operating Temperature Range: Must encompass -30°C to 85°C
• Electrical Life: Minimum 100,000 Cycles

Substitute parts are grouped into two categories:

Direct Equivalent: C&K 7101SYA3RE meets all critical parameters with identical specifications and active product status.

Similar Substitutes: Electroswitch A123S1YAG, A123S1YAQ, and A123S1YAQP meet core functional requirements with minor parameter variations in current rating (6A), voltage rating (125V AC), actuator length (10.41mm), and electrical life (60,000 cycles).

Parameter Comparison

Engineering Selection Recommendations

C&K 7101SYA3RE is the primary direct equivalent for the obsolete 7101SYA3LE. This part maintains identical electrical specifications, mechanical dimensions, and termination characteristics while offering active product status and current availability. Both parts carry RoHS compliance certifications suitable for regulated applications.

Electroswitch A123S1YAG, A123S1YAQ, and A123S1YAQP are functionally compatible alternatives with enhanced electrical ratings. These parts exceed the minimum current requirement (6A versus 5A) and AC voltage rating (125V versus 120V), providing design margin in applications operating near rated limits. All three maintain the required SPDT configuration, On-On function, panel-mount right-angle orientation, PC pin termination, and 1/4-40 bushing thread. Operating temperature range extends to 90°C, exceeding the original specification.

The primary trade-off with Electroswitch substitutes is reduced electrical life (60,000 cycles versus 100,000 cycles). Applications requiring extended cycle life should prioritize the C&K 7101SYA3RE direct equivalent.

A123S1YAQP incorporates an anti-rotation actuator feature, distinguishing it from the standard round actuator in the original part and other substitutes. This feature prevents unintended rotation during installation or operation in high-vibration environments.

Frequently Asked Questions (FAQ)

Q: Can the C&K 7101SYA3RE directly replace the obsolete 7101SYA3LE without circuit modification?

A: Yes. The 7101SYA3RE maintains identical electrical ratings (5A, 120V AC, 28V DC), circuit configuration (SPDT), switch function (On-On), mechanical mounting (panel mount, right angle), and termination style (PC pin). No circuit or mechanical redesign is required.

Q: Are the Electroswitch A123S1 series parts suitable for applications originally designed for the 7101SYA3LE?

A: Yes, with consideration of parameter differences. The A123S1 series meets all core functional requirements: SPDT configuration, On-On function, 5A minimum current capability (rated 6A), 120V minimum AC voltage (rated 125V), 28V DC rating, panel-mount right-angle orientation, PC pin termination, and 1/4-40 bushing thread. The higher current and voltage ratings provide design margin. However, the reduced electrical life (60,000 versus 100,000 cycles) should be evaluated against application duty cycle requirements.

Q: What is the significance of the anti-rotation actuator in the A123S1YAQP?

A: The anti-rotation actuator prevents the switch handle from rotating during installation or in high-vibration applications. This feature is beneficial in environments subject to mechanical shock or continuous vibration but is not required for standard panel-mount applications. The standard round actuator in other substitutes is suitable for stationary or low-vibration installations.

Q: Do all substitute parts meet RoHS compliance requirements?

A: Yes. The C&K 7101SYA3RE carries RoHS compliance certification. The Electroswitch A123S1 series (A123S1YAG, A123S1YAQ, A123S1YAQP) are all RoHS compliant. Compliance status should be confirmed with the specific supplier for the intended application and regulatory jurisdiction.

Q: What is the impact of the 0.26mm difference in actuator length between the main part and Electroswitch substitutes?

A: The main part features a 10.67mm actuator length, while Electroswitch substitutes measure 10.41mm. This 0.26mm difference is negligible for standard panel-mount applications with standard operator clearance. However, applications with tight panel geometry or custom bezels should verify physical fit before production implementation.

Q: Are there inventory considerations when selecting between direct and similar substitutes?

A: Yes. The C&K 7101SYA3RE (direct equivalent) has 754 units in stock. Electroswitch alternatives offer higher availability: A123S1YAG (762 units), A123S1YAQ (910 units), and A123S1YAQP (1,078 units). For high-volume requirements or extended lead-time applications, the Electroswitch options provide greater supply security.