LSYDC3KY-FP Snap Action Switch - Equivalent & Substitute Parts

Part Overview

The LSYDC3KY-FP is a snap action switch manufactured by Honeywell Sensing and Productivity Solutions, classified as an SPDT (Single Pole Double Throw) chassis mount device. This switch is rated for 10A AC at 120V and features a roller plunger actuator with IP67 ingress protection. The product is currently listed as obsolete, making identification of equivalent substitute parts essential for system maintenance, repair, and component sourcing.

Substiute Parts

LSYDC3KY-FP

Honeywell Sensing and Productivity SolutionsIn Stock: 648LSYDC3KY-FP Datasheet

Current PartRFQ

LSYDC3KP-FP

Honeywell Sensing and Productivity SolutionsIn Stock: 1120LSYDC3KP-FP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LSYDC3KY-FP 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-Momentary operation

Mechanical Parameters:

• Actuator type: Roller Plunger
• Mounting configuration: Chassis Mount
• Termination: Cable Leads with 12-foot length
• Ingress protection: IP67 rating

Environmental & Compliance Parameters:

• Operating temperature: -12°C to 105°C
• RoHS compliance requirement
• MSL rating: 1 (Unlimited)

Substitute parts must match all electrical specifications, mechanical configuration, and environmental ratings. The LSYDC3KY-FP belongs to the Honeywell HDLS series snap action switch family. Substitutes are identified within this product family based on identical parameter alignment.

Parameter Comparison

Engineering Selection Recommendations

The LSYDC3KY-FP is classified as an obsolete product. The LSYDC3KP-FP is the direct equivalent substitute part, currently in active production status with identical electrical, mechanical, and environmental specifications.

Selection Basis:

All critical parameters align between the main part and substitute:

• Electrical performance is identical across AC and DC ratings
• Mechanical configuration, actuator response, and travel characteristics are identical
• Environmental operating range and ingress protection are identical
• Both parts maintain RoHS compliance and MSL 1 rating
• Termination and mounting configurations are identical

The LSYDC3KP-FP is available in higher inventory quantity (1105 pieces) compared to the obsolete LSYDC3KY-FP (629 pieces), and maintains active product status, ensuring continued availability and support.

Frequently Asked Questions (FAQ)

Q: Can LSYDC3KP-FP directly replace LSYDC3KY-FP in existing applications?

A: Yes. The LSYDC3KP-FP is a direct equivalent substitute. All electrical ratings (10A AC at 120V, 800mA DC at 115V), circuit configuration (SPDT), mechanical characteristics (roller plunger actuator, 1814gf operating force), and environmental specifications (-12°C to 105°C operating range, IP67 protection) are identical. No circuit modifications or mechanical adjustments are required.

Q: What is the difference between LSYDC3KY-FP and LSYDC3KP-FP?

A: The parts are functionally and electrically identical. The primary difference is product status: LSYDC3KY-FP is obsolete, while LSYDC3KP-FP is active production. Both belong to the Honeywell HDLS series and share the same base product number (LSYDC3).

Q: Are there any compatibility concerns with cable leads and termination?

A: No. Both parts feature identical cable lead termination with 12-foot cable length. Connector compatibility and electrical interface are the same.

Q: Does the substitute part maintain RoHS compliance?

A: Yes. The LSYDC3KP-FP is RoHS compliant with MSL 1 (Unlimited) rating, identical to the original part.

Q: Why is LSYDC3KY-FP listed as obsolete?

A: Product obsolescence is determined by manufacturer lifecycle decisions. The LSYDC3KP-FP represents the current active equivalent within the same product family.

Q: Can I use LSYDC3KP-FP in high-reliability or safety-critical applications?

A: Substitution suitability depends on application-specific requirements beyond the provided parameters. Consult application documentation and system requirements for high-reliability or safety-critical use cases.