LSYJB3K-7N Equivalent & Substitute Parts

Part Overview

The LSYJB3K-7N is a snap action SPDT (Single Pole Double Throw) switch manufactured by Honeywell Sensing and Productivity Solutions. This chassis mount switch is rated for 10A at 120V AC and 800mA at 115V DC, featuring spring and cable actuators with screw terminal connections. The product is currently obsolete, necessitating identification of equivalent substitute components that maintain functional and electrical compatibility for existing applications.

Substiute Parts

LSYJB3K-7N

Honeywell Sensing and Productivity SolutionsIn Stock: 20433LSYJB3K-7N Datasheet

Current PartRFQ

LSJ3K-7N

Honeywell Sensing and Productivity SolutionsIn Stock: 1094LSJ3K-7N Datasheet

SimilarRFQ

D4A-3E15N

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

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LSYJB3K-7N are identified based on strict electrical and mechanical parameter alignment. The primary substitution criteria are:

Critical Matching Parameters:

• Circuit configuration: SPDT (DB/DM)
• Switch function: On-Momentary
• Current rating: 10A AC minimum
• Voltage rating: 120V AC minimum
• Mounting type: Chassis Mount
• Termination style: Screw Terminal

Acceptable Variation Parameters:

• Operating temperature range (may be narrower than original)
• Operating force (within functional tolerance for cable actuation)
• Pretravel measurement units (linear distance or angular measurement)
• Product status (Active substitutes preferred for obsolete parts)

The two identified substitutes meet these criteria with documented electrical compatibility and mechanical interchangeability for chassis mount applications.

Parameter Comparison

Engineering Selection Recommendations

LSJ3K-7N (Honeywell): This substitute provides the closest electrical and mechanical match to the LSYJB3K-7N. Both parts share identical current ratings (10A AC, 800mA DC), voltage ratings (120V AC, 115V DC), operating force (198gf), and pretravel specifications. The LSJ3K-7N is an active product with RoHS compliance, making it the preferred substitute for direct replacement in existing designs. The narrower operating temperature range (-12°C to 93°C versus -40°C to 121°C) must be evaluated against application requirements.

D4A-3E15N (Omron): This substitute meets the core SPDT circuit, 10A AC current, and 125V AC voltage requirements. The D4A-3E15N offers additional features including IP67 ingress protection and documented electrical life of 1,000,000 cycles. However, the DC current rating (6A) exceeds the original specification, and the DC voltage rating (30V) is significantly higher than the original (115V). The operating temperature range (-10°C to 80°C) is narrower than the original. This substitute is suitable for applications where the higher DC ratings and environmental protection are beneficial or neutral to system requirements.

Both substitutes maintain SPDT circuit configuration, On-Momentary function, chassis mount design, and screw terminal connections required for mechanical and electrical compatibility.

Frequently Asked Questions (FAQ)

Q: Can LSJ3K-7N directly replace LSYJB3K-7N in all applications?

A: LSJ3K-7N provides direct electrical and mechanical compatibility for applications operating within the temperature range of -12°C to 93°C. Applications requiring operation below -12°C or above 93°C require evaluation against specific system requirements.

Q: What are the key differences between the two substitute options?

A: LSJ3K-7N is a Honeywell product with identical electrical ratings and operating force to the original LSYJB3K-7N. D4A-3E15N is an Omron product with higher DC current capability (6A versus 800mA), higher DC voltage rating (30V versus 115V), IP67 environmental protection, and documented electrical life specification. The choice depends on application requirements for environmental protection and DC circuit parameters.

Q: Is the D4A-3E15N suitable for applications requiring 115V DC operation?

A: The D4A-3E15N has a DC voltage rating of 30V, which is below the original 115V DC specification. This substitute is not suitable for applications requiring 115V DC operation.

Q: What is the significance of the operating force difference between LSYJB3K-7N (198gf) and D4A-3E15N (150gf)?

A: Operating force indicates the mechanical effort required to actuate the switch. The D4A-3E15N requires less force (150gf) than the original (198gf). This difference is relevant for cable-actuated applications where consistent actuation force is critical to system design.

Q: Are both substitutes RoHS compliant?

A: LSJ3K-7N is RoHS compliant. D4A-3E15N has RoHS status listed as "Not applicable," indicating it may not be subject to RoHS requirements or compliance status is not documented.

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

A: LSJ3K-7N is available in Bulk packaging. D4A-3E15N is available in Bulk packaging. Packaging specifications should be confirmed with supplier documentation for procurement requirements.