LSYKC1A-8A Equivalent & Substitute Parts Reference

Part Overview

The LSYKC1A-8A is a snap action SPDT switch manufactured by Honeywell Sensing and Productivity Solutions, designed for chassis mount applications with 10A AC and 800mA DC current capacity at 120V AC / 115V DC. This component operates with a spring and cat whisker actuator mechanism, featuring a 2.000" (50.8mm) pretravel distance and an operating force of 141gf. The part is classified as obsolete, necessitating identification of active equivalent alternatives to maintain supply chain continuity and support ongoing system maintenance and new designs.

Substiute Parts

LSYKC1A-8A

Honeywell Sensing and Productivity SolutionsIn Stock: 1156LSYKC1A-8A Datasheet

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LSK1A-8A

Honeywell Sensing and Productivity SolutionsIn Stock: 1090LSK1A-8A Datasheet

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D4A-3115N

Omron Automation and SafetyIn Stock: 783D4A-3115N Datasheet

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D4A-3315N

Omron Automation and SafetyIn Stock: 972D4A-3315N Datasheet

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D4A-3E15N

Omron Automation and SafetyIn Stock: 1004D4A-3E15N Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LSYKC1A-8A is determined by strict alignment with the following critical parameters: SPDT circuit configuration, On-Mom switch function, 10A AC current capacity, 120V AC voltage rating, spring cat whisker actuator type, and chassis mount configuration. The substitute parts identified maintain these core electrical and mechanical specifications, ensuring functional compatibility within the original application envelope.

The LSK1A-8A represents a direct Honeywell equivalent with identical electrical ratings and actuator characteristics, differing only in product status (active versus obsolete) and packaging format. The Omron D4A series substitutes (D4A-3115N, D4A-3315N, D4A-3E15N) provide equivalent SPDT functionality and 10A AC capacity with enhanced environmental protection (IP67 rating) and extended electrical life specifications, though with modified termination style (screw terminal versus plug in) and adjusted voltage/current DC ratings.

Parameter Comparison

Engineering Selection Recommendations

LSK1A-8A (Honeywell): This substitute maintains complete electrical and mechanical equivalence to the LSYKC1A-8A, with identical current ratings, voltage specifications, actuator characteristics, and pretravel distance. The LSK1A-8A is classified as active product status, ensuring ongoing availability and supply chain support. Both components share RoHS compliance certification. The primary distinction is packaging format (bulk versus original packaging) and a reduced upper operating temperature limit (-12°C ~ 93°C versus -12°C ~ 121°C). Selection of LSK1A-8A is appropriate for applications where the original plug-in termination style and Honeywell platform continuity are required.

D4A-3115N, D4A-3315N, D4A-3E15N (Omron): These Omron D4A series switches provide SPDT functionality and 10A AC capacity with enhanced environmental specifications including IP67 ingress protection and 1,000,000 cycle electrical life rating. All three variants maintain active product status and RoHS compliance (with exception of D4A-3E15N, which carries "not applicable" RoHS designation). Substitution requires accommodation of screw terminal configuration in place of plug-in termination. DC current capacity is elevated to 6A, and AC voltage rating increases to 125V, both exceeding original specifications. Operating temperature ranges are narrower than the original part. D4A-3315N and D4A-3E15N include status indicator features not present in the original design. Selection of Omron variants is appropriate for applications requiring enhanced environmental sealing and extended electrical life, with termination style modification capability.

Frequently Asked Questions (FAQ)

Q: Can LSK1A-8A directly replace LSYKC1A-8A without modification?

A: LSK1A-8A provides direct functional equivalence with identical SPDT circuit, 10A AC / 800mA DC current ratings, 120V AC / 115V DC voltage specifications, spring cat whisker actuator, and 2.000" pretravel. Plug-in termination style is preserved. The primary consideration is the reduced upper operating temperature limit of 93°C versus the original 121°C. Direct substitution is feasible where this temperature constraint does not conflict with application requirements.

Q: What are the key differences when substituting with Omron D4A series switches?

A: Omron D4A series substitutes maintain SPDT configuration and 10A AC capacity but introduce three material differences: termination style changes from plug-in to screw terminal, requiring wiring harness modification; DC current capacity increases to 6A and AC voltage rating increases to 125V, both exceeding original specifications; and operating temperature ranges narrow to -20°C ~ 100°C (D4A-3115N) or -10°C ~ 80°C (D4A-3315N, D4A-3E15N). Conversely, Omron variants provide IP67 environmental protection and 1,000,000 cycle electrical life specification not documented for the original part.

Q: Are all substitute parts RoHS compliant?

A: LSK1A-8A and D4A-3115N and D4A-3315N carry explicit RoHS Compliant certification. D4A-3E15N is designated "Not applicable" for RoHS status. Applications requiring RoHS compliance should prioritize LSK1A-8A or D4A-3115N / D4A-3315N.

Q: What is the impact of pretravel specification differences?

A: LSYKC1A-8A and LSK1A-8A specify pretravel as 2.000" (50.8mm), a linear distance measurement. Omron D4A series switches specify pretravel as 15°, an angular measurement. These represent different actuator design approaches. Applications with mechanical constraints dependent on linear pretravel distance should prioritize Honeywell LSK1A-8A to maintain identical actuation geometry.

Q: Can D4A-3315N and D4A-3E15N be used interchangeably?

A: D4A-3315N and D4A-3E15N share identical electrical specifications, actuator characteristics, and environmental ratings. Both include status indicator features. The distinction is RoHS designation: D4A-3315N is RoHS Compliant while D4A-3E15N carries "Not applicable" status. Selection between these variants depends on regulatory compliance requirements for the end application.

Q: What inventory levels are available for each substitute?

A: LSK1A-8A: 1027 pcs; D4A-3115N: 723 pcs; D4A-3315N: 941 pcs; D4A-3E15N: 945 pcs. All substitutes maintain active stock status.