Honeywell 381L10K Potentiometer - Equivalent & Substitute Parts

Part Overview

The Honeywell 381L10K is a 10k Ohm, 1 Watt linear panel mount potentiometer featuring conductive plastic resistive material and solder lug termination. This component is classified as obsolete, necessitating identification of active substitute parts for ongoing applications requiring equivalent electrical and mechanical specifications.

Substiute Parts

381L10K

Honeywell Sensing and Productivity SolutionsIn Stock: 1180381L10K Datasheet

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RES10KE

OhmiteIn Stock: 919RES10KE Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 381L10K is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

• Resistance value: 10k Ohm (exact match)
• Tolerance: ±10% (exact match)
• Taper characteristic: Linear (exact match)
• Number of gangs: 1 (exact match)

Mechanical Equivalence Requirements:

• Rotation angle: 300° (exact match)
• Termination style: Solder Lug (exact match)
• Mounting type: Panel Mount (exact match)
• Bushing thread: 1/4-32 (exact match)

Allowable Variation:

• Power rating: Substitute parts may exceed the original 1W specification, provided all other parameters remain equivalent
• Resistive material: Substitutes may differ (conductive plastic vs. wirewound) while maintaining electrical performance
• Physical body size: Minor dimensional variations are acceptable if mounting and termination compatibility is preserved

Parameter Comparison

Engineering Selection Recommendations

The Ohmite RES10KE qualifies as a direct electrical and mechanical substitute for the obsolete Honeywell 381L10K based on matching resistance, tolerance, taper, rotation, termination, mounting, and thread specifications.

Compliance Considerations:

The 381L10K carries RoHS Compliant status with MSL 1 (Unlimited). The RES10KE substitute is ROHS3 Compliant and REACH Unaffected, meeting current regulatory requirements for new designs and procurement.

Power Rating Differential:

The RES10KE provides 12.5W power handling versus the original 1W specification. This increased capacity does not compromise substitution validity; applications operating within the original 1W thermal envelope will function identically, while the substitute accommodates higher power dissipation scenarios without modification.

Material Composition:

The resistive material differs between parts (conductive plastic vs. wirewound). Both materials achieve the specified linear taper and 300° rotation within ±10% tolerance. Selection between these materials depends on application-specific requirements for frequency response, noise characteristics, and environmental exposure, which are not specified in the provided parameters.

Frequently Asked Questions (FAQ)

Q: Can the Ohmite RES10KE directly replace the Honeywell 381L10K in existing assemblies?

A: Yes. The RES10KE matches all critical electrical parameters (10k Ohm, ±10% tolerance, linear taper) and mechanical specifications (300° rotation, solder lug termination, 1/4-32 panel mount bushing). Physical installation is compatible without circuit modification.

Q: Why does the RES10KE have a higher power rating (12.5W vs. 1W)?

A: Power rating indicates maximum thermal dissipation capability. The higher rating in the substitute does not affect operation in circuits designed for 1W dissipation. The substitute simply provides additional thermal margin and is suitable for applications requiring higher power handling.

Q: Are there differences in performance between conductive plastic and wirewound resistive materials?

A: Both materials achieve the specified linear taper and resistance tolerance. Wirewound construction typically exhibits lower noise and better frequency response characteristics, while conductive plastic offers smoother operation and longer mechanical life. Material selection should align with specific application requirements not addressed in the provided specifications.

Q: What is the significance of the different product statuses (Obsolete vs. Active)?

A: The 381L10K is obsolete and no longer manufactured by Honeywell. The RES10KE is active production, ensuring availability for new procurement and long-term supply chain continuity.

Q: Are there packaging differences between these parts?

A: The 381L10K is specified with "-" packaging notation, while the RES10KE is supplied in Bulk packaging. Both are suitable for component-level integration; packaging differences do not affect electrical or mechanical compatibility.