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

Part Overview

The C&K 7105SYCLE is a panel-mounted toggle switch with SPDT (Single Pole Double Throw) circuit configuration, rated for 5A at 120V AC and 28V DC. This component features a momentary-off-momentary (Mom-Off-Mom) switch function with epoxy-sealed PC pin termination. The 7105SYCLE is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing system maintenance and new design implementations.

Substiute Parts

7105SYCLE

C&KIn Stock: 10527105SYCLE Datasheet

Current PartRFQ

7105SYCRE

C&KIn Stock: 11087105SYCRE Datasheet

DirectRFQ

A127S1YCQ

ElectroswitchIn Stock: 878A127S1YCQ Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 7105SYCLE are identified based on strict electrical and mechanical parameter compatibility. The following criteria determine valid substitution:

Primary Compatibility Parameters:

• Circuit configuration: SPDT
• Switch function: Mom-Off-Mom
• Current rating: Minimum 5A (AC/DC)
• Voltage rating: Minimum 120V AC and 28V DC
• Mounting type: Panel Mount
• Termination style: PC Pin
• Bushing thread: 1/4-40
• Actuator type: Standard Round

Substitute Categories:

Direct Manufacturer Substitute (C&K 7105SYCRE): Active product from the same manufacturer and series with identical electrical specifications and mechanical interface. Represents the primary replacement for the obsolete 7105SYCLE.

Similar Manufacturer Substitute (Electroswitch A127S1YCQ): Alternative manufacturer product meeting or exceeding all critical electrical parameters with compatible mechanical interface. Provides cross-manufacturer compatibility option.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Recommended Primary Option): The C&K 7105SYCRE is the preferred substitute for the obsolete 7105SYCLE. Both components share identical electrical ratings, mechanical interfaces, and circuit configurations. The 7105SYCRE carries Active product status with RoHS compliance and REACH affected designation, making it suitable for new designs and legacy system updates.

For Cross-Manufacturer Substitution: The Electroswitch A127S1YCQ provides an alternative when C&K 7105SYCRE availability is constrained. This component exceeds the original specifications with 6A current rating (versus 5A), 125V AC rating (versus 120V), and 60,000 electrical life cycles (versus 40,000). The actuator length differential of 0.26mm (10.41mm versus 10.67mm) remains within mechanical tolerance for standard panel cutout dimensions. Both substitute options maintain identical bushing thread specifications (1/4-40) and PC pin termination, ensuring mechanical compatibility.

Compliance Considerations: The original 7105SYCLE is RoHS non-compliant. Both substitute parts are RoHS compliant, supporting regulatory requirements for new applications. The 7105SYCRE is REACH affected, while the A127S1YCQ carries vendor-undefined REACH status.

Frequently Asked Questions (FAQ)

Q: Can the 7105SYCRE directly replace the 7105SYCLE without circuit modifications? A: Yes. The 7105SYCRE maintains identical electrical specifications (5A at 120V AC/28V DC), circuit configuration (SPDT), switch function (Mom-Off-Mom), and mechanical interface (1/4-40 bushing thread, PC pin termination). No circuit or panel modifications are required.

Q: What are the key differences between the C&K 7105SYCRE and Electroswitch A127S1YCQ? A: The A127S1YCQ provides higher current capacity (6A versus 5A), higher AC voltage rating (125V versus 120V), extended electrical life (60,000 versus 40,000 cycles), and wider operating temperature range (-30°C to 90°C versus -30°C to 85°C). Actuator length differs by 0.26mm. Both maintain compatible mechanical interfaces and PC pin termination.

Q: Are there mechanical compatibility concerns with the A127S1YCQ actuator length difference? A: The A127S1YCQ actuator length of 10.41mm is 0.26mm shorter than the original 7105SYCLE specification of 10.67mm. This difference remains within standard mechanical tolerances for panel-mounted toggle switches with circular 6.35mm diameter cutouts and does not affect functional operation.

Q: What is the inventory status for substitute parts? A: The C&K 7105SYCRE has 1033 pieces in stock. The Electroswitch A127S1YCQ has 864 pieces in stock. Both are available as new original components.

Q: Does the RoHS compliance difference affect substitution decisions? A: The original 7105SYCLE is RoHS non-compliant. Both substitute parts are RoHS compliant. For new designs or systems requiring regulatory compliance, the substitute parts are appropriate selections. For legacy system maintenance where RoHS compliance is not a requirement, either substitute remains functionally equivalent.

Q: Can the A127S1YCQ be used in applications originally designed for the 7105SYCLE? A: Yes. The A127S1YCQ meets or exceeds all critical electrical parameters (current, voltage, circuit configuration, switch function) and maintains mechanical compatibility through identical bushing thread specification and PC pin termination. The higher electrical life rating and extended temperature range provide additional operational margin.