Honeywell 485048M9728 Potentiometer Equivalent & Substitute Parts

Part Overview

The Honeywell 485048M9728 is a 5k Ohm 2W linear panel mount potentiometer featuring conductive plastic resistive material, solder lug termination, and a 312° rotation angle. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system maintenance and new design implementations. The part's 1-gang linear taper configuration and user-defined adjustment type serve applications requiring precise resistance control in audio, instrumentation, and industrial equipment.

Substiute Parts

485048M9728

Honeywell Sensing and Productivity SolutionsIn Stock: 856485048M9728 Datasheet

Current PartRFQ

PDB181-B225K-502B

Bourns Inc.In Stock: 965PDB181-B225K-502B Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Honeywell 485048M9728 is determined by the following critical parameters:

Primary Matching Criteria:

• Resistance value: 5k Ohm (exact match required)
• Taper configuration: Linear (functional equivalence)
• Number of gangs: 1 (single-channel operation)
• Mounting type: Panel Mount (mechanical compatibility)
• Termination compatibility: Solder lug or equivalent connection method

Secondary Compatibility Factors:

• Power rating: Substitute must meet or exceed 2W requirement
• Rotation angle: 312° (main part) versus 300° (substitute) represents acceptable mechanical variation within standard potentiometer design tolerances
• Bushing thread: 3/8-32 (main part) versus M7 x 0.75 (substitute) requires mechanical adapter consideration
• Resistive material: Conductive plastic (main part) versus carbon (substitute) affects frequency response and noise characteristics

The Bourns PDB181-B225K-502B qualifies as a functional substitute based on matching resistance, taper, gang configuration, and panel mount design. However, differences in power rating, termination style, and mechanical specifications require engineering evaluation for specific applications.

Parameter Comparison

Engineering Selection Recommendations

Substitution Feasibility Assessment:

The Bourns PDB181-B225K-502B presents a viable functional substitute for the obsolete Honeywell 485048M9728 based on core electrical parameters: identical 5k Ohm resistance, linear taper, single-gang configuration, and panel mount design.

Critical Considerations:

1. Power Rating Differential: The substitute is rated at 0.2W versus the main part's 2W. Applications requiring continuous power dissipation exceeding 0.2W necessitate thermal analysis or alternative component selection.

2. Termination Compatibility: The main part uses solder lug termination while the substitute employs PC pins. Circuit board layout and connection methodology must accommodate this difference.

3. Mechanical Interface: Bushing thread specifications differ (3/8-32 versus M7 x 0.75). Panel mounting requires mechanical adapter or redesign of mounting hardware.

4. Resistive Material: Conductive plastic (main part) versus carbon (substitute) affects frequency response, noise floor, and temperature stability. Audio and precision instrumentation applications require performance validation.

5. Compliance Status: Both components meet RoHS requirements. The substitute's active product status ensures long-term availability and supply chain stability compared to the obsolete main part.

Recommendation Basis: Selection should prioritize application power requirements, mechanical mounting constraints, and performance specifications for the intended circuit function.

Frequently Asked Questions (FAQ)

Q: Can the Bourns PDB181-B225K-502B directly replace the Honeywell 485048M9728 without circuit modification?

A: Direct replacement requires evaluation of three factors: (1) power dissipation in the application must not exceed 0.2W continuous rating, (2) circuit board layout must accommodate PC pin termination instead of solder lugs, and (3) mechanical mounting must address the bushing thread difference. Electrical function is compatible for linear 5k Ohm applications.

Q: What is the significance of the tolerance difference (±5% versus ±20%)?

A: The main part specifies ±5% tolerance, providing tighter resistance accuracy. The substitute's ±20% tolerance may introduce greater circuit variation. Applications requiring precise resistance values should account for this specification difference in circuit design margins.

Q: How does the resistive material difference affect performance?

A: Conductive plastic (main part) typically exhibits lower noise, better frequency response, and superior temperature stability compared to carbon film (substitute). Audio applications and precision instrumentation may experience performance differences. Carbon film potentiometers are suitable for general-purpose applications with less stringent noise requirements.

Q: What does the detent feature on the substitute part provide?

A: The Bourns substitute includes a detent switch mechanism, creating tactile detent positions during rotation. The main part has no built-in switch. This feature may be beneficial for applications requiring discrete adjustment steps or may require accommodation if continuous smooth rotation is required.

Q: Are there mechanical adapter solutions for the different bushing threads?

A: The main part uses 3/8-32 UNF thread while the substitute uses M7 x 0.75 metric thread. Mechanical adapters or custom mounting brackets can bridge this difference, but panel redesign may be more practical for production implementations.

Q: Why is the main part classified as obsolete?

A: Obsolete status indicates the Honeywell 485048M9728 is no longer manufactured. The substitute's active product status ensures continued availability, supply chain reliability, and manufacturer technical support for new designs or maintenance applications.

Q: What is the practical difference between 312° and 300° rotation angles?

A: This 12° difference represents approximately 4% variation in total rotation range. For most linear potentiometer applications, this variation falls within acceptable mechanical tolerance and does not affect functional performance.