Equivalent & Substitute Parts for LSM7N-1A

Part Overview

The LSM7N-1A is a DPDT snap action switch manufactured by Honeywell Sensing and Productivity Solutions, designed for chassis mount applications with a side rotary roller actuator. This switch is rated for 10A AC at 120V and 800mA DC at 115V, featuring a momentary-off-momentary (Mom-Off-Mom) switch function with center neutral positioning.

The LSM7N-1A is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain system functionality and ensure continued availability for replacement, repair, and new design implementations where this switch specification is required.

Substiute Parts

LSM7N-1A

Honeywell Sensing and Productivity SolutionsIn Stock: 1033LSM7N-1A Datasheet

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LSM4N-1B

Honeywell Sensing and Productivity SolutionsIn Stock: 1102LSM4N-1B Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the LSM7N-1A is based on strict electrical and mechanical parameter matching within the Honeywell HDLS series. The following parameters must remain identical for functional equivalence:

• Circuit configuration: DPDT (DB/DM)
• Switch function: Mom-Off-Mom with center neutral
• Current ratings: 10A AC and 800mA DC
• Voltage ratings: 120V AC and 115V DC
• Actuator type: Side rotary with roller mechanism
• Mounting configuration: Chassis mount with screw terminals
• Operating temperature range: -1°C to 121°C
• Compliance certifications: RoHS compliant, MSL 1

The LSM4N-1B meets all these criteria and is identified as a direct functional equivalent within the HDLS product family.

Parameter Comparison

Engineering Selection Recommendations

The LSM4N-1B is a direct functional equivalent to the LSM7N-1A and is suitable for replacement applications. The primary distinction is product status: LSM7N-1A is obsolete while LSM4N-1B is active, ensuring continued availability and supply chain reliability.

Both parts are manufactured by Honeywell Sensing and Productivity Solutions within the HDLS series and maintain identical electrical specifications, mechanical characteristics, and compliance certifications. The LSM4N-1B is available in bulk packaging with 1066 units in stock, compared to the LSM7N-1A which has 941 units available.

For new designs, repair applications, or system upgrades requiring a DPDT 10A 120V snap action switch with side rotary roller actuation and chassis mount configuration, the LSM4N-1B provides equivalent performance with the advantage of active product status and confirmed supply availability.

Frequently Asked Questions (FAQ)

Q: Can LSM4N-1B be used as a direct replacement for LSM7N-1A in existing installations?

A: Yes. The LSM4N-1B is electrically and mechanically equivalent to the LSM7N-1A. All electrical ratings, switch function characteristics, actuator specifications, mounting configuration, and termination style are identical. Direct substitution is supported without circuit modification.

Q: What is the difference between LSM7N-1A and LSM4N-1B?

A: The parts are functionally identical. The primary difference is product status: LSM7N-1A is obsolete while LSM4N-1B is active. Additionally, LSM4N-1B is supplied in bulk packaging, whereas LSM7N-1A packaging details are not specified.

Q: Are there any compliance or certification differences between these parts?

A: No. Both parts are RoHS compliant, carry MSL 1 (Unlimited) moisture sensitivity rating, and share identical ECCN (EAR99) and HTSUS (8536.50.9055) classifications.

Q: What are the key electrical parameters that define substitution compatibility?

A: Substitution compatibility is determined by: DPDT circuit configuration, Mom-Off-Mom switch function with center neutral, 10A AC at 120V and 800mA DC at 115V ratings, side rotary roller actuator, chassis mount configuration, and screw terminal termination.

Q: Is the LSM4N-1B available in the same packaging as LSM7N-1A?

A: LSM4N-1B is supplied in bulk packaging. The LSM7N-1A packaging specification is not provided in the available data. Packaging requirements should be confirmed with the supplier for specific application needs.

Q: What is the operating force specification for these switches?

A: Both LSM7N-1A and LSM4N-1B have an operating force of 46gfm with identical pretravel (18°), differential travel (10°), and overtravel (57°) specifications.