LSYJC3K-7N Equivalent & Substitute Parts Reference

Part Overview

The LSYJC3K-7N is a snap action SPDT switch manufactured by Honeywell Sensing and Productivity Solutions. This chassis-mounted switch is rated for 10A AC at 120V and 800mA DC at 115V, featuring a spring and cable actuator with screw terminal connections. The product is classified as obsolete, making identification of equivalent substitute parts essential for system maintenance, repair, and component sourcing in legacy equipment applications.

Substiute Parts

LSYJC3K-7N

Honeywell Sensing and Productivity SolutionsIn Stock: 830LSYJC3K-7N Datasheet

Current PartRFQ

D4A-3315N

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

SimilarRFQ

D4A-3E15N

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

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the LSYJC3K-7N is determined by strict alignment of electrical and mechanical parameters within the snap action switch category. The primary substitution criteria are:

Electrical Compatibility Parameters:

• Circuit configuration: SPDT (DB/DM) topology
• Switch function: On-Mom operation
• AC current rating: minimum 10A
• AC voltage rating: minimum 120V
• DC current rating: minimum 800mA
• DC voltage rating: minimum 115V

Mechanical Compatibility Parameters:

• Mounting type: Chassis Mount
• Termination style: Screw Terminal
• Actuator type: Spring-based actuation mechanism

Regulatory & Environmental Parameters:

• RoHS compliance status
• MSL rating: 1 (Unlimited)
• Operating temperature range overlap

The substitute parts D4A-3315N and D4A-3E15N, both manufactured by Omron Automation and Safety, meet the core electrical requirements with AC ratings of 10A at 125V and DC ratings of 6A at 30V, exceeding the minimum specifications of the original part. Both substitutes maintain identical mounting, termination, and circuit configuration, with spring-based actuators and chassis mount design.

Parameter Comparison

Engineering Selection Recommendations

Both D4A-3315N and D4A-3E15N are active product substitutes for the obsolete LSYJC3K-7N. Selection between these options is based on regulatory compliance requirements:

D4A-3315N Selection Criteria:

• Required when RoHS compliance certification is mandatory for the end application
• Explicitly listed as RoHS Compliant
• Suitable for new equipment designs or systems requiring full regulatory documentation

D4A-3E15N Selection Criteria:

• Applicable when RoHS compliance is not a regulatory requirement
• Functionally equivalent to D4A-3315N with identical electrical and mechanical specifications
• Suitable for legacy system repairs where original RoHS status was not applicable

Both substitutes exceed the electrical specifications of the original part. The Omron D4A series switches provide enhanced environmental protection (IP67 rating) and documented electrical life (1,000,000 cycles), neither of which were specified for the original Honeywell part. The operating temperature range of the substitutes (-10°C to 80°C) is narrower than the original (-12°C to 121°C); applications requiring operation below -10°C or above 80°C require verification of system thermal requirements.

Frequently Asked Questions (FAQ)

Q: Can D4A-3315N and D4A-3E15N be used interchangeably as substitutes for LSYJC3K-7N?

A: Yes. Both Omron parts are electrically and mechanically equivalent. The primary difference is RoHS compliance status. D4A-3315N is explicitly RoHS Compliant, while D4A-3E15N has RoHS status listed as Not applicable. Selection depends on regulatory requirements for your application.

Q: What are the key electrical differences between the original part and substitutes?

A: The substitutes exceed the original specifications. LSYJC3K-7N is rated 10A AC at 120V and 800mA DC at 115V. D4A-3315N and D4A-3E15N are rated 10A AC at 125V and 6A DC at 30V. The higher voltage and current ratings of the substitutes ensure compatibility in the original circuit.

Q: Are there mechanical compatibility concerns?

A: Both substitutes maintain identical mounting (Chassis Mount) and termination (Screw Terminal) configurations. The actuator type differs slightly: the original uses Spring and Cable actuation, while substitutes use Spring and Cat Whisker actuation. Both are spring-based mechanisms suitable for On-Mom switch function applications.

Q: What is the operating temperature consideration?

A: The original LSYJC3K-7N operates from -12°C to 121°C. Substitutes operate from -10°C to 80°C. If your application requires operation below -10°C or above 80°C, verify that system thermal conditions remain within the substitute part's range.

Q: Do the substitutes provide additional features?

A: Yes. Both D4A-3315N and D4A-3E15N include IP67 ingress protection (Dust Tight, Waterproof) and documented electrical life of 1,000,000 cycles. The original part specifications did not include these parameters. These enhancements provide improved environmental durability.

Q: What is the inventory status for these parts?

A: LSYJC3K-7N has 732 pieces in stock (obsolete status). D4A-3315N has 941 pieces in stock (active product). D4A-3E15N has 945 pieces in stock (active product). Both substitutes are readily available.

Q: Are there packaging differences?

A: The original part packaging is listed as dash (-). Both substitutes are supplied in Bulk packaging. Confirm bulk packaging meets your procurement and handling requirements.