LSF1F Snap Action Switch - Equivalent & Substitute Parts

Part Overview

The LSF1F is a snap action switch manufactured by Honeywell Sensing and Productivity Solutions, classified as an SPDT (Single Pole Double Throw) switch with chassis mount configuration. This component is rated for 10A AC at 120V and 800mA DC at 115V, featuring a side roller plunger actuator and plug-in termination style.

The LSF1F is currently listed as obsolete. Identifying equivalent and substitute parts is necessary to maintain system functionality, ensure design continuity, and support ongoing maintenance and production requirements for applications utilizing this switch architecture.

Substiute Parts

LSF1F

Honeywell Sensing and Productivity SolutionsIn Stock: 853LSF1F Datasheet

Current PartRFQ

LSF1A

Honeywell Sensing and Productivity SolutionsIn Stock: 1123LSF1A Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LSF1F is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

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

Mechanical Parameters:

• Actuator type: Side Roller Plunger
• Mounting type: Chassis Mount
• Termination style: Plug In
• Operating force: 2720gf
• Travel specifications: Pretravel 0.100" (2.5mm), Differential Travel 0.025" (0.6mm), Overtravel 0.190" (4.8mm)

Environmental & Compliance Parameters:

• Operating temperature range: -12°C to 93°C
• RoHS compliance status
• Moisture sensitivity level: 1 (Unlimited)

The LSF1A meets all substitution criteria and is classified as an equivalent part within the HDLS series.

Parameter Comparison

Engineering Selection Recommendations

The LSF1F is classified as obsolete. The LSF1A is the direct equivalent substitute part, sharing identical electrical, mechanical, and environmental specifications within the HDLS series.

Selection Basis:

All critical parameters match between LSF1F and LSF1A:

• Electrical performance: 10A AC at 120V / 800mA DC at 115V
• Mechanical interface: Chassis mount with plug-in termination
• Actuator characteristics: Side roller plunger with identical travel specifications
• Environmental compliance: RoHS compliant, MSL 1 (Unlimited)
• Operating temperature range: -12°C to 93°C

The LSF1A maintains active product status, ensuring ongoing availability and supply chain continuity. Both parts share the same base product number (LSF1) within the HDLS series, confirming functional and physical compatibility.

Frequently Asked Questions (FAQ)

Q: Can LSF1A directly replace LSF1F in existing applications?

A: Yes. The LSF1A is electrically and mechanically equivalent to the LSF1F. All electrical ratings, mechanical specifications, and environmental parameters are identical. The LSF1A is the active equivalent for the obsolete LSF1F.

Q: What is the difference between LSF1F and LSF1A?

A: The primary difference is product status. LSF1F is obsolete; LSF1A is active. Both parts are manufactured by Honeywell Sensing and Productivity Solutions within the HDLS series and share identical specifications for circuit configuration, current/voltage ratings, actuator type, mounting, termination, and operating characteristics.

Q: Are there packaging differences between LSF1F and LSF1A?

A: LSF1F is supplied in standard packaging; LSF1A is supplied in bulk packaging. This difference does not affect component functionality or electrical/mechanical performance.

Q: What parameters must remain identical for substitution?

A: For SPDT snap action switches in this category, the following parameters must match: circuit configuration (SPDT DB/DM), switch function (On-Mom), current ratings (10A AC / 800mA DC), voltage ratings (120V AC / 115V DC), actuator type (side roller plunger), mounting type (chassis mount), termination style (plug in), operating force (2720gf), travel specifications, and operating temperature range (-12°C to 93°C).

Q: Is LSF1A RoHS compliant?

A: Yes. LSF1A is RoHS compliant with MSL 1 (Unlimited), matching the compliance status of LSF1F.

Q: What is the operating temperature range for both parts?

A: Both LSF1F and LSF1A operate within the temperature range of -12°C to 93°C.