LSM4N-1A Equivalent & Substitute Parts

Part Overview

The LSM4N-1A is a snap action DPDT (double pole double throw) 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 side rotary roller actuator with center neutral functionality and Mom-Off-Mom switch operation. The LSM4N-1A is classified as obsolete product status. Identification of equivalent and substitute parts is necessary to maintain system functionality and ensure continued availability for maintenance, repair, and new design implementations where this switch type is specified.

Substiute Parts

LSM4N-1A

Honeywell Sensing and Productivity SolutionsIn Stock: 861LSM4N-1A Datasheet

Current PartRFQ

LSM4N-1B

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

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the LSM4N-1A is based on electrical and mechanical parameter equivalence within the HDLS series. The substitute part LSM4N-1B maintains identical electrical specifications including circuit configuration (DPDT), switch function (Mom-Off-Mom), current ratings (10A AC / 800mA DC), and voltage ratings (120V AC / 115V DC). Mechanical parameters including actuator type (side rotary roller), mounting configuration (chassis mount), termination style (screw terminal), and operating temperature range (-1°C to 121°C) are identical. Both parts share the same base product number (LSM4) and feature center neutral functionality. The key differentiator is product status: LSM4N-1A is obsolete while LSM4N-1B is active, making LSM4N-1B the direct functional equivalent for ongoing applications.

Parameter Comparison

Engineering Selection Recommendations

The LSM4N-1B is the direct substitute for the obsolete LSM4N-1A. Both parts are manufactured by Honeywell Sensing and Productivity Solutions and share identical electrical and mechanical specifications. The LSM4N-1B maintains active product status, ensuring continued availability and manufacturer support. Both parts carry RoHS Compliant certification and identical export classification (EAR99). For applications currently specified with LSM4N-1A, direct substitution with LSM4N-1B is supported by complete parameter equivalence. The LSM4N-1B is available in bulk packaging, whereas the LSM4N-1A was supplied in standard packaging. Both parts are classified as MSL 1 (Unlimited moisture sensitivity level), indicating no special moisture handling requirements during storage or assembly.

Frequently Asked Questions (FAQ)

Q: Can LSM4N-1B directly replace LSM4N-1A in existing applications?

A: Yes. The LSM4N-1B is a direct functional equivalent. All electrical parameters (10A AC at 120V, 800mA DC at 115V), mechanical parameters (side rotary roller actuator, chassis mount, screw terminal), and operational characteristics (Mom-Off-Mom function, center neutral, identical force and travel specifications) are identical between the two parts.

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

A: The primary difference is product status. LSM4N-1A is classified as obsolete, while LSM4N-1B is active. This means LSM4N-1B has ongoing manufacturer support and availability. Both parts are from the same HDLS series and share the base product number LSM4.

Q: Are there packaging differences between these parts?

A: Yes. LSM4N-1A was supplied in standard packaging, while LSM4N-1B is available in bulk packaging. This packaging difference does not affect electrical or mechanical compatibility.

Q: Do both parts meet the same compliance standards?

A: Yes. Both LSM4N-1A and LSM4N-1B are RoHS Compliant, carry the same ECCN classification (EAR99), and share the same HTSUS code (8536.50.9055). Both are classified as MSL 1 (Unlimited), requiring no special moisture handling.

Q: What are the key electrical parameters that define substitution for this switch?

A: The defining electrical parameters are circuit configuration (DPDT), switch function (Mom-Off-Mom), current ratings (10A AC / 800mA DC), and voltage ratings (120V AC / 115V DC). Any substitute must match all four parameters.

Q: What are the key mechanical parameters that define substitution for this switch?

A: The defining mechanical parameters are actuator type (side rotary roller), mounting type (chassis mount), termination style (screw terminal), and operating temperature range (-1°C to 121°C). Operating force (46gfm) and travel specifications (18° pretravel, 10° differential travel, 57° overtravel) must also match.