LSYAC3KC-FP Equivalent & Substitute Parts Reference

Part Overview

The LSYAC3KC-FP is a snap action SPDT switch manufactured by Honeywell Sensing and Productivity Solutions, designed for chassis mount applications with cable lead termination. This switch operates at 10A AC (120V) and 800mA DC (115V) with IP67 ingress protection rating. The product is classified as obsolete, making identification of equivalent substitute parts essential for system maintenance, repair, and component sourcing in legacy equipment applications.

Substiute Parts

LSYAC3KC-FP

Honeywell Sensing and Productivity SolutionsIn Stock: 835LSYAC3KC-FP Datasheet

Current PartRFQ

LSA1AC

Honeywell Sensing and Productivity SolutionsIn Stock: 1169LSA1AC Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LSYAC3KC-FP is determined by strict equivalence across the following critical parameters:

Electrical Compatibility Parameters:

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

Mechanical & Physical Parameters:

• Actuator type: Side Rotary - No Lever
• Mounting type: Chassis Mount
• Termination style: Cable Leads
• Cable length: 6 feet
• Ingress protection: IP67 minimum

Environmental & Compliance Parameters:

• Operating temperature range: Must encompass or exceed -12°C to 105°C
• RoHS compliance status
• Moisture sensitivity level: 1 (Unlimited)

The LSA1AC substitute part meets all specified electrical, mechanical, and environmental parameters. However, the operating temperature range differs: LSA1AC operates from -12°C to 60°C, which does not fully encompass the original part's upper temperature limit of 105°C. This represents a functional limitation in high-temperature applications.

Parameter Comparison

Engineering Selection Recommendations

LSA1AC as Primary Substitute:

The LSA1AC is the direct equivalent substitute for the LSYAC3KC-FP across all electrical, mechanical, and environmental specifications. Both parts are manufactured by Honeywell Sensing and Productivity Solutions within the HDLS series and share identical circuit configuration, current/voltage ratings, actuator type, mounting configuration, and termination style.

Product Status Advantage:

The LSA1AC holds active product status, whereas the LSYAC3KC-FP is classified as obsolete. This distinction provides significant advantages for new system designs, long-term component availability, and supply chain continuity. The LSA1AC is currently in production and maintains inventory availability (1101 pieces in stock versus 737 pieces for the obsolete part).

Temperature Range Consideration:

The LSA1AC operates within a temperature range of -12°C to 60°C, compared to the LSYAC3KC-FP range of -12°C to 105°C. Applications requiring sustained operation above 60°C must account for this specification difference. For applications operating within the -12°C to 60°C envelope, the LSA1AC provides full functional equivalence.

Compliance Status:

Both parts maintain RoHS compliance and identical moisture sensitivity levels (MSL 1 - Unlimited), ensuring regulatory and environmental compatibility in applications subject to these requirements.

Frequently Asked Questions (FAQ)

Q: Can LSA1AC directly replace LSYAC3KC-FP in all applications?

A: LSA1AC provides direct electrical and mechanical equivalence for applications operating within the -12°C to 60°C temperature range. Applications requiring operation above 60°C require evaluation against the LSA1AC upper temperature limit of 60°C.

Q: What is the primary difference between these two parts?

A: The primary difference is operating temperature range. LSYAC3KC-FP operates to 105°C; LSA1AC operates to 60°C. All other electrical, mechanical, and environmental parameters are identical.

Q: Why is LSYAC3KC-FP classified as obsolete?

A: Product obsolescence is determined by manufacturer discontinuation. The LSA1AC represents the active production equivalent within the HDLS series.

Q: Are there packaging differences between these parts?

A: LSYAC3KC-FP is supplied with "-" packaging designation; LSA1AC is supplied in Bulk packaging. Both use identical cable lead termination and 6-foot cable length.

Q: Do both parts meet RoHS compliance requirements?

A: Yes. Both LSYAC3KC-FP and LSA1AC are RoHS compliant with identical moisture sensitivity levels (MSL 1 - Unlimited).

Q: What is the base product number for LSA1AC?

A: The base product number is LSA1, with LSA1AC representing the specific variant with the specified electrical and mechanical parameters.

Q: Are the mechanical specifications identical between these parts?

A: Yes. Both parts share identical actuator type (Side Rotary - No Lever), mounting type (Chassis Mount), operating force (46 gfm), pretravel (15°), differential travel (5°), and overtravel (60°).

Q: Can LSA1AC be used in legacy equipment designed for LSYAC3KC-FP?

A: LSA1AC provides functional equivalence for legacy equipment applications operating within the -12°C to 60°C temperature range. Equipment operating above 60°C requires thermal evaluation.