Honeywell LSN1F Snap Action Switch - Equivalent & Substitute Parts

Part Overview

The Honeywell LSN1F is a snap action SPDT (Single Pole Double Throw) switch rated for 10A at 120V AC operation with chassis mount configuration. This component is classified as obsolete, making identification of equivalent substitute parts essential for system maintenance, repair, and component sourcing.

The LSN1F serves applications requiring reliable switching control with side rotary actuation and plug-in termination. Due to its obsolete status, the active equivalent LSN1A provides functional continuity for procurement and replacement scenarios.

Substiute Parts

LSN1F

Honeywell Sensing and Productivity SolutionsIn Stock: 990LSN1F Datasheet

Current PartRFQ

LSN1A

Honeywell Sensing and Productivity SolutionsIn Stock: 1178LSN1A Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the LSN1F is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Circuit configuration: SPDT (DB/DM)
• Current rating: 10A AC / 800mA DC
• Voltage rating: 120V AC / 115V DC
• Switch function: On-On operation

Mechanical Parameters:

• Actuator type: Side Rotary - No Lever
• Mounting type: Chassis Mount
• Termination style: Plug In
• Operating force: 46gfm
• Travel specifications: Pretravel 65°, Differential Travel 40°, Overtravel 20°

Environmental Parameters:

• Operating temperature range: -1°C to 121°C
• RoHS compliance: Required
• MSL rating: 1 (Unlimited)

The LSN1A qualifies as a direct substitute because it maintains identical electrical, mechanical, and environmental specifications while offering active product status and improved availability.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: LSN1A

The LSN1A is the direct functional equivalent of the LSN1F. Selection of LSN1A is based on the following engineering criteria:

1. Electrical Equivalence: All current and voltage ratings are identical, ensuring drop-in compatibility in existing circuit designs.

2. Mechanical Equivalence: Actuator type, mounting configuration, and termination style are identical, enabling direct mechanical replacement without redesign.

3. Operational Equivalence: Travel specifications and operating force characteristics are identical, maintaining system performance parameters.

4. Compliance Equivalence: Both parts maintain RoHS compliance and identical MSL ratings, satisfying regulatory and environmental requirements.

5. Product Status Advantage: LSN1A holds active product status, providing superior long-term availability and supply chain reliability compared to the obsolete LSN1F.

6. Regulatory Alignment: Both parts carry identical ECCN (EAR99) and HTSUS (8536.50.9055) classifications, maintaining export and tariff compliance.

Packaging Consideration: LSN1A is supplied in bulk packaging, whereas LSN1F uses standard dash packaging. Procurement quantities should account for this difference in packaging configuration.

Frequently Asked Questions (FAQ)

Q: Can LSN1A directly replace LSN1F in existing applications?

A: Yes. The LSN1A maintains identical electrical specifications (10A at 120V AC), mechanical configuration (side rotary actuator, chassis mount, plug-in termination), and operational characteristics (46gfm operating force, identical travel specifications). No circuit or mechanical modifications are required.

Q: What is the primary advantage of selecting LSN1A over LSN1F?

A: LSN1A holds active product status, ensuring ongoing availability and supply chain support. LSN1F is classified as obsolete, creating sourcing challenges and potential long-term supply discontinuation.

Q: Are there any differences in compliance or regulatory classification?

A: No. Both LSN1F and LSN1A carry identical RoHS compliance status, MSL ratings, ECCN classifications (EAR99), and HTSUS codes (8536.50.9055).

Q: Does packaging type affect electrical or mechanical performance?

A: No. Packaging differences (dash versus bulk) do not affect component performance. Packaging selection should be based on procurement volume requirements and inventory management practices.

Q: What parameters must remain identical for substitution to be valid?

A: Circuit configuration (SPDT), current rating (10A AC / 800mA DC), voltage rating (120V AC / 115V DC), actuator type (side rotary), mounting type (chassis mount), termination style (plug-in), and operating force (46gfm) must all remain identical. Any deviation in these parameters invalidates substitution.

Q: Are there temperature or environmental limitations affecting substitution?

A: No. Both parts operate across the identical temperature range (-1°C to 121°C) and maintain identical MSL ratings (1 - Unlimited), ensuring equivalent performance in all specified environmental conditions.