LSYBB4L Snap Action Switch - Equivalent & Substitute Parts

Part Overview

The LSYBB4L 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 top rotary actuator without lever and screw terminal termination.

The LSYBB4L carries an obsolete product status. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing maintenance and production requirements for systems utilizing this switch architecture.

Substiute Parts

LSYBB4L

Honeywell Sensing and Productivity SolutionsIn Stock: 870LSYBB4L Datasheet

Current PartRFQ

LSB3K

Honeywell Sensing and Productivity SolutionsIn Stock: 989LSB3K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LSYBB4L is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

• Circuit configuration must be SPDT (DB/DM)
• Current rating must support minimum 10A AC and 800mA DC
• Voltage ratings must match or exceed 120V AC and 115V DC

Mechanical Equivalence Requirements:

• Actuator type must be Top Rotary - No Lever
• Mounting type must be Chassis Mount
• Termination style must be Screw Terminal
• Operating force must be 28gfm
• Angular parameters (pretravel, differential travel, overtravel) must match exactly

Environmental & Compliance Requirements:

• Operating temperature range must encompass the original specification
• RoHS compliance status must be maintained
• Moisture sensitivity level must be equivalent or superior

The LSB3K substitute part meets all electrical, mechanical, and compliance criteria for direct substitution with the LSYBB4L.

Parameter Comparison

Engineering Selection Recommendations

The LSB3K is the qualified substitute for the obsolete LSYBB4L based on the following engineering criteria:

Electrical Compatibility: Both parts are identical in circuit configuration (SPDT DB/DM), current ratings (10A AC / 800mA DC), and voltage specifications (120V AC / 115V DC). Screw terminal termination is consistent across both parts, ensuring direct wiring compatibility.

Mechanical Compatibility: Actuator type, mounting configuration, and all angular parameters (pretravel, differential travel, overtravel) are identical. Operating force specification of 28gfm is matched. These parameters confirm mechanical interchangeability in chassis mount applications.

Compliance & Availability: The LSB3K maintains RoHS compliance and MSL Level 1 rating identical to the LSYBB4L. The LSB3K carries active product status with confirmed inventory availability (889 pieces), whereas the LSYBB4L is obsolete. The LSB3K is manufactured by the same original equipment manufacturer (Honeywell Sensing and Productivity Solutions) within the same HDLS series.

Temperature Consideration: The LSB3K operating temperature range (-1°C ~ 121°C) is narrower at the lower limit compared to the LSYBB4L (-29°C ~ 121°C). Applications requiring operation below -1°C must evaluate this specification difference against system requirements.

Frequently Asked Questions (FAQ)

Q: Can the LSB3K directly replace the LSYBB4L in existing designs?

A: Yes. The LSB3K is electrically and mechanically equivalent to the LSYBB4L across all critical parameters: SPDT circuit, 10A AC / 800mA DC ratings, 120V AC / 115V DC voltage specifications, top rotary actuator, chassis mount configuration, and screw terminal termination. Both parts are RoHS compliant with identical MSL ratings.

Q: What is the difference in operating temperature range between these parts?

A: The LSYBB4L operates from -29°C to 121°C, while the LSB3K operates from -1°C to 121°C. The LSB3K has a narrower lower temperature limit. Applications requiring operation below -1°C must confirm compatibility with system requirements before substitution.

Q: Why is the LSYBB4L listed as obsolete?

A: The LSYBB4L carries obsolete product status, indicating it is no longer manufactured. The LSB3K is the active equivalent part within the same HDLS series and manufacturer portfolio, ensuring continued availability and supply chain support.

Q: Are the packaging formats interchangeable?

A: The LSYBB4L is supplied in standard packaging, while the LSB3K is supplied in bulk packaging. Packaging format does not affect electrical or mechanical performance. Component selection should be based on procurement and inventory management requirements.

Q: What certifications apply to both parts?

A: Both the LSYBB4L and LSB3K are RoHS compliant and carry Moisture Sensitivity Level 1 (Unlimited). Both are classified under ECCN EAR99 for export control purposes. The LSB3K carries HTSUS code 8536.50.9055, while the LSYBB4L carries HTSUS code 8536.50.7000.

Q: Are there any mechanical mounting differences?

A: No. Both parts feature identical chassis mount configuration with screw terminal termination. Mounting hole patterns, terminal spacing, and actuator positioning are equivalent, confirming direct mechanical interchangeability.