LSYHB1A Snap Action Switch - Equivalent & Substitute Parts

Part Overview

The LSYHB1A is a snap action switch manufactured by Honeywell Sensing and Productivity Solutions, classified as a Single Pole Double Throw (SPDT) switch with chassis mount configuration. This component is rated for 10A AC at 120V and 800mA DC at 115V, featuring a side rotary actuator without lever and plug-in termination style.

The LSYHB1A is currently listed as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for systems utilizing this component.

Substiute Parts

LSYHB1A

Honeywell Sensing and Productivity SolutionsIn Stock: 997LSYHB1A Datasheet

Current PartRFQ

LSH1A

Honeywell Sensing and Productivity SolutionsIn Stock: 1093LSH1A Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LSYHB1A are identified based on strict electrical and mechanical parameter matching within the HDLS series. The substitution logic is based on the following critical parameters:

Electrical Parameters:

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

Mechanical Parameters:

• Actuator type (Side Rotary - No Lever)
• Mounting type (Chassis Mount)
• Termination style (Plug In)
• Operating force (19gfm)
• Travel specifications (Pretravel 9°, Differential Travel 3°, Overtravel 66°)

Compliance Parameters:

• RoHS compliance status
• Moisture sensitivity level (MSL 1)

The LSH1A meets all critical electrical and mechanical parameters required for direct substitution. Differences in product status (active vs. obsolete) and operating temperature range do not preclude functional equivalence for applications within the overlapping temperature specification.

Parameter Comparison

Engineering Selection Recommendations

LSH1A as Primary Substitute:

The LSH1A is the direct functional equivalent for the LSYHB1A. All critical electrical parameters, mechanical specifications, and compliance certifications are identical. The LSH1A maintains active product status with Honeywell, ensuring ongoing availability and supply chain support.

The operating temperature range difference (-1°C to 121°C for LSH1A versus -29°C to 121°C for LSYHB1A) represents a narrower lower temperature specification. Applications operating above -1°C will experience no functional limitation. Applications requiring operation below -1°C must evaluate the temperature requirement against the LSH1A specification.

Both components are RoHS compliant and carry identical moisture sensitivity levels, supporting equivalent environmental and regulatory compliance requirements.

Frequently Asked Questions (FAQ)

Q: Can LSH1A directly replace LSYHB1A in existing designs?

A: Yes, for applications operating within the LSH1A temperature range (-1°C to 121°C). All electrical ratings, circuit configuration, mechanical specifications, and termination styles are identical. Verify your application's minimum operating temperature requirement against the -1°C lower limit of the LSH1A.

Q: What is the difference between LSYHB1A and LSH1A?

A: The primary differences are product status (LSYHB1A is obsolete; LSH1A is active) and operating temperature range (LSYHB1A: -29°C to 121°C; LSH1A: -1°C to 121°C). All electrical and mechanical parameters are identical.

Q: Are there packaging differences between these parts?

A: The LSYHB1A is supplied in standard packaging, while the LSH1A is supplied in bulk packaging. Both use identical plug-in termination and chassis mount configuration. Verify packaging requirements for your procurement and assembly processes.

Q: Is LSH1A RoHS compliant?

A: Yes. Both LSYHB1A and LSH1A are RoHS compliant with identical moisture sensitivity levels (MSL 1 - Unlimited).

Q: What if my application requires operation below -1°C?

A: The LSH1A specification does not extend below -1°C. For applications requiring operation at -29°C or lower, alternative components outside the HDLS series must be evaluated, as no direct substitute within the provided parameters meets this requirement.

Q: Are the electrical ratings identical?

A: Yes. Both components are rated for 10A AC at 120V and 800mA DC at 115V with identical SPDT circuit configuration and On-Momentary switch function.