LSYJC3K-7A Equivalent & Substitute Parts

Part Overview

The LSYJC3K-7A is a snap action SPDT switch manufactured by Honeywell Sensing and Productivity Solutions, designed for chassis mount applications with screw terminal connections. This switch is rated for 10A AC at 120V and 800mA DC at 115V, featuring a spring rod actuator with On-Momentary function. The product is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for continued system operation and procurement.

Substiute Parts

LSYJC3K-7A

Honeywell Sensing and Productivity SolutionsIn Stock: 1253LSYJC3K-7A Datasheet

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LSJ3K-7A

Honeywell Sensing and Productivity SolutionsIn Stock: 963LSJ3K-7A 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 of the LSYJC3K-7A is determined by strict alignment of electrical and mechanical parameters. The primary substitution criteria include circuit configuration (SPDT), switch function (On-Mom), mounting type (Chassis Mount), termination style (Screw Terminal), and current/voltage ratings compatible with the original application.

The LSJ3K-7A represents a direct equivalent from the same manufacturer (Honeywell), maintaining identical electrical specifications and mechanical characteristics while offering active product status. This part is the preferred substitute when procurement of the original LSYJC3K-7A is not feasible.

The D4A-3315N and D4A-3E15N (Omron Automation and Safety) serve as functional alternatives with equivalent SPDT circuit configuration and On-Mom function. These parts maintain the 10A AC current rating and chassis mount configuration. However, these alternatives present parameter variations in voltage rating (125V AC versus 120V AC), DC current capability (6A versus 800mA), operating force (150gf versus 283gf), and pretravel specification (15° versus 1.000"). These Omron switches include enhanced features such as IP67 ingress protection and status indicators, with documented electrical life of 1,000,000 cycles.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: LSJ3K-7A

The LSJ3K-7A is the recommended substitute for the obsolete LSYJC3K-7A. Both parts are manufactured by Honeywell Sensing and Productivity Solutions and maintain identical electrical specifications (10A AC at 120V, 800mA DC at 115V) and mechanical characteristics (spring rod actuator, 283gf operating force, 1.000" pretravel). The LSJ3K-7A holds active product status and is RoHS compliant, ensuring continued availability and regulatory compliance. The operating temperature range of the LSJ3K-7A (-12°C ~ 93°C) is slightly narrower than the original part (-12°C ~ 121°C), requiring verification that the application does not require operation above 93°C.

Alternative Substitutes: D4A-3315N and D4A-3E15N

The Omron D4A-3315N and D4A-3E15N switches provide functional alternatives when the Honeywell LSJ3K-7A is unavailable. Both Omron parts maintain the SPDT circuit configuration, On-Mom function, 10A AC current rating, and chassis mount configuration. The D4A-3315N is RoHS compliant; the D4A-3E15N carries "Not applicable" RoHS status. Both Omron alternatives include IP67 ingress protection and documented electrical life of 1,000,000 cycles, providing enhanced environmental sealing and reliability data not specified for the original part.

Substitution with Omron parts requires engineering evaluation of the following parameter differences: AC voltage rating (125V versus 120V), DC current capability (6A versus 800mA), operating force (150gf versus 283gf), pretravel specification (15° versus 1.000"), and operating temperature range (-10°C ~ 80°C versus -12°C ~ 121°C). These differences may affect system performance depending on application requirements.

Frequently Asked Questions (FAQ)

Q: Can the LSJ3K-7A directly replace the LSYJC3K-7A without circuit modification?

A: Yes. The LSJ3K-7A maintains identical electrical ratings (10A AC at 120V, 800mA DC at 115V), circuit configuration (SPDT), switch function (On-Mom), mounting type (Chassis Mount), and termination style (Screw Terminal). Direct substitution is supported for applications operating within the LSJ3K-7A temperature range of -12°C to 93°C.

Q: What are the key differences between the Honeywell LSJ3K-7A and the Omron D4A alternatives?

A: The primary differences are: (1) AC voltage rating: Honeywell 120V versus Omron 125V; (2) DC current: Honeywell 800mA versus Omron 6A; (3) Operating force: Honeywell 283gf versus Omron 150gf; (4) Pretravel: Honeywell 1.000" versus Omron 15°; (5) Operating temperature: Honeywell -12°C to 93°C versus Omron -10°C to 80°C. The Omron switches include IP67 ingress protection and 1,000,000 cycle electrical life specification.

Q: Are the D4A-3315N and D4A-3E15N electrically interchangeable?

A: Both Omron parts share identical electrical specifications (10A AC at 125V, 6A DC at 30V), circuit configuration (SPDT), switch function (On-Mom), and mechanical characteristics. The primary difference is RoHS compliance status: D4A-3315N is RoHS compliant; D4A-3E15N is not applicable for RoHS. Selection between these parts depends on regulatory requirements for the end application.

Q: What packaging options are available for these substitute parts?

A: The LSJ3K-7A is supplied in Bulk packaging. The Omron D4A-3315N and D4A-3E15N are also supplied in Bulk packaging. The original LSYJC3K-7A packaging specification is not provided in the available data.

Q: Does the lower operating force of the Omron switches (150gf versus 283gf) affect compatibility?

A: Operating force differences may affect actuator response characteristics and user interface feel. Applications requiring specific actuation force profiles should evaluate whether the 150gf Omron specification meets functional requirements. This parameter difference does not affect electrical compatibility but may impact mechanical system design.

Q: What is the significance of the IP67 rating on the Omron switches?

A: IP67 rating indicates dust-tight and waterproof ingress protection. The original LSYJC3K-7A and substitute LSJ3K-7A do not specify ingress protection. Applications requiring environmental sealing benefit from the Omron alternatives' IP67 rating, though this feature may not be necessary for all applications.