C&K 7105SY4ZQE Toggle Switch SPDT Equivalent & Substitute Parts

Part Overview

The C&K 7105SY4ZQE is a panel-mounted toggle switch with SPDT (Single Pole Double Throw) circuit configuration, rated for 5A at 120V AC and 28V DC. This switch features a momentary-off-momentary (Mom-Off-Mom) function with epoxy-sealed solder lug terminals and operates across a temperature range of -30°C to 85°C. The part is currently active in production status with ROHS3 compliance and REACH affected designation.

Equivalent and substitute parts become necessary when the primary part experiences supply constraints, obsolescence of related models, or when design flexibility permits selection from compatible alternatives that meet the same electrical and mechanical requirements.

Substiute Parts

7105SY4ZQE

C&KIn Stock: 10157105SY4ZQE Datasheet

Current PartRFQ

M2018SS1W01

NKK SwitchesIn Stock: 2331M2018SS1W01 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 7105SY4ZQE is determined by strict alignment with the following critical parameters:

Mandatory Matching Parameters:

• Circuit configuration: SPDT
• Switch function: Mom-Off-Mom
• Mounting type: Panel Mount
• Termination style: Solder Lug
• Bushing thread: 1/4-40
• Operating temperature range: -30°C to 85°C minimum
• Actuator type: Standard Round

Electrical Compatibility Parameters:

• Current rating: Minimum 5A AC capability
• Voltage rating AC: Minimum 120V
• Voltage rating DC: Minimum 28V
• Panel cutout diameter: 6.35mm (or compatible within mechanical tolerance)

The NKK Switches M2018SS1W01 meets these substitution criteria with equivalent mechanical configuration and superior electrical ratings (6A AC at 125V AC, 3A at 30V DC), though it carries obsolete product status and reduced electrical life specification (25,000 cycles versus 40,000 cycles).

Parameter Comparison

Engineering Selection Recommendations

The C&K 7105SY4ZQE remains the primary selection for new designs due to its active product status and higher electrical life rating (40,000 cycles). Both parts maintain ROHS3 compliance and identical operating temperature specifications.

The NKK Switches M2018SS1W01 is electrically compatible for AC applications with superior voltage and current ratings. However, its obsolete status and reduced electrical life (25,000 cycles) make it suitable only for replacement or legacy system applications where supply of the primary part is unavailable. The panel cutout diameter difference (6.50mm versus 6.35mm) requires mechanical verification for panel compatibility.

For DC applications, the 7105SY4ZQE is preferred due to its 5A DC rating versus the M2018SS1W01's 3A DC rating.

Frequently Asked Questions (FAQ)

Q: Can the NKK M2018SS1W01 directly replace the C&K 7105SY4ZQE in all applications?

A: Electrical compatibility exists for AC circuits. The M2018SS1W01 provides higher AC ratings (6A at 125V). For DC applications, the 7105SY4ZQE is preferred due to its 5A DC capability versus 3A DC on the substitute. Panel cutout diameter differs by 0.15mm (6.50mm versus 6.35mm), requiring mechanical fit verification.

Q: What is the significance of the electrical life difference?

A: The 7105SY4ZQE specifies 40,000 cycles versus 25,000 cycles for the M2018SS1W01. This parameter indicates the number of switching operations before performance degradation. Applications requiring high cycle counts favor the primary part.

Q: Why is the NKK part listed as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The part may remain available through inventory channels but receives no manufacturing support or design updates.

Q: Are both parts RoHS compliant?

A: Yes. Both the C&K 7105SY4ZQE and NKK M2018SS1W01 carry ROHS3 compliance certification.

Q: What panel cutout size should be specified for installation?

A: The 7105SY4ZQE requires a 6.35mm circular cutout. The M2018SS1W01 requires 6.35mm circular cutout. Verify panel thickness and material compatibility with the 1/4-40 bushing thread specification.