Honeywell 49M910K Wirewound Potentiometer - Equivalent & Substitute Parts

Part Overview

The Honeywell 49M910K is a 10k Ohm, 1.5W wirewound linear potentiometer designed for panel mount applications with a 300° rotation range and solder lug termination. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system maintenance and new design implementations where legacy specifications must be maintained.

Substiute Parts

49M910K

Honeywell Sensing and Productivity SolutionsIn Stock: 84449M910K Datasheet

Current PartRFQ

RES10KE

OhmiteIn Stock: 919RES10KE Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 49M910K is determined by the following core parameters:

Critical Parameters (Must Match):

• Resistance value: 10k Ohm
• Taper type: Linear
• Number of turns: 1
• Resistive material: Wirewound
• Termination style: Solder lug
• Mounting type: Panel mount
• Bushing thread: 1/4-32
• Rotation angle: 300°

Allowable Variation Parameters:

• Power rating: Substitute must equal or exceed the original 1.5W specification
• Tolerance: Substitute tolerance may differ from ±5%
• Physical dimensions: Minor variations in body diameter and actuator length are permissible provided mechanical fit within the panel mount assembly is maintained
• Product status: Active status substitutes are preferred for long-term availability

The Ohmite RES10KE meets all critical parameters while providing enhanced power handling capability (12.5W versus 1.5W), ensuring compatibility with the original application while offering improved thermal performance margins.

Parameter Comparison

Engineering Selection Recommendations

The Ohmite RES10KE qualifies as a direct functional substitute for the Honeywell 49M910K based on matching critical electrical and mechanical parameters. Selection considerations include:

Availability: The RES10KE maintains active product status with 906 units in stock, compared to the obsolete 49M910K status. This ensures sustained supply chain access for replacement and new production requirements.

Compliance: Both components maintain RoHS compliance (RoHS Compliant and ROHS3 Compliant respectively), satisfying environmental regulatory requirements. The RES10KE additionally carries REACH Unaffected status.

Power Margin: The RES10KE provides 12.5W power rating versus the original 1.5W specification, delivering an 8.3x thermal safety margin. This enhanced capability reduces thermal stress during operation and extends component service life.

Mechanical Fit: The RES10KE body diameter of 0.875" (22.23mm) represents a 0.125" increase over the 49M910K. Panel mount assemblies with standard 1/4-32 bushing clearances accommodate this dimensional variation without modification.

Tolerance Consideration: The RES10KE tolerance of ±10% is wider than the original ±5%. Applications requiring tighter tolerance control should evaluate this parameter against specific circuit requirements.

Frequently Asked Questions (FAQ)

Q: Can the Ohmite RES10KE directly replace the Honeywell 49M910K in existing assemblies?

A: Yes. Both components share identical resistance value (10k Ohm), taper (linear), termination style (solder lug), mounting type (panel mount), bushing thread (1/4-32), and rotation angle (300°). The RES10KE body diameter of 0.875" is slightly larger than the 49M910K at 0.750", but remains compatible with standard panel mount clearances.

Q: What is the significance of the power rating difference (1.5W versus 12.5W)?

A: The RES10KE's higher power rating indicates greater thermal dissipation capability. In applications where the original 49M910K operates at or near its 1.5W limit, the RES10KE provides substantial thermal margin, reducing component temperature rise and improving reliability.

Q: Does the ±10% tolerance of the RES10KE affect circuit performance compared to the ±5% tolerance of the 49M910K?

A: Tolerance impact depends on circuit application. In applications where potentiometer resistance variation directly affects circuit output (such as precision analog signal conditioning), the wider ±10% tolerance may introduce measurable variation. In applications where the potentiometer functions as a user adjustment control, tolerance difference is typically negligible.

Q: Are there packaging differences between these components?

A: The 49M910K is specified with "-" packaging notation, while the RES10KE is supplied in bulk packaging. Both components utilize solder lug termination suitable for direct PCB or panel assembly integration.

Q: What compliance certifications apply to both components?

A: Both components are RoHS compliant. The 49M910K carries RoHS Compliant status with MSL 1 (Unlimited). The RES10KE carries ROHS3 Compliant status with REACH Unaffected designation, indicating compliance with current environmental regulations.

Q: Is the RES10KE suitable for new design implementations?

A: Yes. The RES10KE's active product status, enhanced power rating, and full regulatory compliance make it suitable for new designs requiring 10k Ohm linear wirewound potentiometers with panel mount configuration.