LS3D3K Snap Action Switch - Equivalent & Substitute Parts

Part Overview

The LS3D3K 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 operates at 10A AC (120V) and 800mA DC (115V) with a roller plunger actuator and screw terminal termination. The LS3D3K is currently listed as obsolete, necessitating identification of equivalent substitute components for ongoing system maintenance and new design implementations. The part belongs to the HDLS series and maintains RoHS compliance with MSL Level 1 rating.

Substiute Parts

LS3D3K

Honeywell Sensing and Productivity SolutionsIn Stock: 1171LS3D3K Datasheet

Current PartRFQ

LSD3K

Honeywell Sensing and Productivity SolutionsIn Stock: 1031LSD3K Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the LS3D3K snap action switch is determined by strict equivalence across electrical and mechanical parameters. The primary substitute identified is the LSD3K, which maintains identical specifications across all critical functional parameters. Substitution validity is established through the following criteria:

Electrical Equivalence Requirements:

• Identical circuit configuration: SPDT (DB/DM)
• Matching current ratings: 10A AC and 800mA DC
• Matching voltage ratings: 120V AC and 115V DC
• Identical switch function: On-Momentary operation

Mechanical Equivalence Requirements:

• Identical actuator type: Roller Plunger
• Identical mounting configuration: Chassis Mount
• Identical termination style: Screw Terminal
• Matching actuation characteristics: Operating force 1814gf, pretravel 0.071" (1.8mm), differential travel 0.016" (0.4mm), overtravel 0.190" (4.8mm)

Environmental & Compliance Equivalence:

• Matching operating temperature range: -12°C to 93°C
• Identical RoHS compliance status
• Identical MSL rating: Level 1

The LSD3K qualifies as a direct substitute based on complete parameter alignment across all specified electrical, mechanical, and environmental criteria.

Parameter Comparison

Engineering Selection Recommendations

The LSD3K represents the direct equivalent substitute for the obsolete LS3D3K snap action switch. Selection of the LSD3K is supported by the following engineering factors:

Functional Equivalence: All electrical parameters, mechanical specifications, and actuation characteristics are identical between the LS3D3K and LSD3K. Both components operate within the same voltage and current ranges, employ identical circuit configurations, and share matching actuator and mounting specifications.

Product Status Advantage: The LSD3K maintains active product status with Honeywell Sensing and Productivity Solutions, ensuring ongoing availability and supply chain continuity. The LS3D3K is classified as obsolete, making the LSD3K the appropriate selection for new designs and replacement applications.

Compliance Alignment: Both components maintain RoHS compliance and identical MSL Level 1 ratings, ensuring compatibility with current manufacturing and environmental standards.

Packaging Consideration: The LSD3K is supplied in bulk packaging, whereas the LS3D3K packaging specification is not provided. Packaging format does not affect functional or mechanical compatibility.

Frequently Asked Questions (FAQ)

Q: Can the LSD3K directly replace the LS3D3K in existing applications?

A: Yes. The LSD3K is electrically and mechanically equivalent to the LS3D3K across all specified parameters. Both components feature identical SPDT circuit configuration, 10A AC (120V) and 800mA DC (115V) ratings, roller plunger actuation, chassis mount configuration, and screw terminal termination. Substitution does not require circuit redesign or mechanical modification.

Q: What is the primary difference between the LS3D3K and LSD3K?

A: The primary difference is product status. The LS3D3K is obsolete, while the LSD3K is active. All electrical, mechanical, and environmental specifications are identical. The LSD3K is supplied in bulk packaging.

Q: Are there any compatibility concerns when substituting the LSD3K for the LS3D3K?

A: No compatibility concerns exist. Both components share identical specifications for circuit configuration, current and voltage ratings, actuator type, mounting method, termination style, and operating temperature range. Both maintain RoHS compliance and MSL Level 1 ratings.

Q: Why is the LS3D3K listed as obsolete?

A: Obsolescence status indicates that the LS3D3K is no longer in active production. The LSD3K serves as the active equivalent, ensuring continued availability of this switch specification within the HDLS series.

Q: Does packaging format affect the functional performance of the LSD3K?

A: No. Packaging format (bulk versus other configurations) does not affect electrical performance, mechanical operation, or compatibility. Packaging considerations are limited to inventory management and handling procedures.

Q: What are the critical parameters for confirming substitution compatibility?

A: Critical parameters include circuit configuration (SPDT), current ratings (10A AC, 800mA DC), voltage ratings (120V AC, 115V DC), actuator type (roller plunger), mounting type (chassis mount), termination style (screw terminal), and operating temperature range (-12°C to 93°C). The LSD3K matches all these parameters.