Honeywell 308L10K Potentiometer - Equivalent & Substitute Parts

Part Overview

The Honeywell 308L10K is a 10k Ohm, 1/2W linear panel mount potentiometer featuring conductive plastic resistive material and solder hook termination. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system maintenance and new design implementations. The 308 series potentiometer serves applications requiring precise manual adjustment with linear taper characteristics and panel-mounted configuration.

Substiute Parts

308L10K

Honeywell Sensing and Productivity SolutionsIn Stock: 803308L10K Datasheet

Current PartRFQ

82A1A-B28-A15L

Bourns Inc.In Stock: 315682A1A-B28-A15L Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Honeywell 308L10K is determined by the following critical parameters that must remain constant or compatible:

Primary Matching Criteria:

• Resistance value: 10k Ohm (exact match required)
• Taper characteristic: Linear (functional requirement)
• Number of gangs: 1 (circuit configuration requirement)
• Number of turns: 1.0 (adjustment range requirement)
• Termination style: Solder Hook (assembly compatibility)
• Mounting type: Panel Mount (mechanical fit requirement)
• Tolerance: ±10% (electrical specification)

Secondary Compatibility Criteria:

• Power rating: Substitute must equal or exceed 0.5W
• Actuator diameter: 0.250" (6.35mm) standard
• Rotation angle: Minimum 295° required
• Resistive material: Conductive Plastic or Cermet acceptable for linear applications

The Bourns 82A1A-B28-A15L meets all primary matching criteria and exceeds power rating specifications, qualifying as a direct functional substitute.

Parameter Comparison

Engineering Selection Recommendations

The Bourns 82A1A-B28-A15L potentiometer qualifies as a functional equivalent to the obsolete Honeywell 308L10K based on matching electrical specifications and circuit requirements. Selection of this substitute is supported by the following factors:

Electrical Compatibility: All critical electrical parameters align: 10k Ohm resistance, ±10% tolerance, linear taper, single gang, single turn configuration, and solder hook termination. The 2W power rating of the substitute exceeds the 0.5W requirement of the original component, providing additional thermal margin in the application.

Mechanical Considerations: The substitute features a larger body footprint (0.625" x 0.625" versus 0.500" x 0.500") and different bushing thread specification (3/8-32 versus 1/4-32). Panel mounting applications must accommodate the increased body dimensions and verify bushing thread compatibility with existing panel hardware.

Compliance and Availability: The Bourns substitute maintains active product status with current manufacturing support and ROHS3 compliance certification. The original Honeywell component is obsolete with no ongoing production. Inventory availability of the substitute (3100 pieces) supports both immediate replacement and future procurement requirements.

Material Consideration: The substitute employs Cermet resistive material in place of the original conductive plastic. Both materials are suitable for linear potentiometer applications with single-turn adjustment characteristics.

Frequently Asked Questions (FAQ)

Q: Can the Bourns 82A1A-B28-A15L directly replace the Honeywell 308L10K without circuit modification?

A: Electrical substitution is direct. The 10k Ohm resistance, linear taper, and single-turn configuration are identical. No circuit modification is required. Mechanical panel mounting requires verification of the larger body dimensions and bushing thread compatibility.

Q: What is the significance of the different resistive materials (Conductive Plastic versus Cermet)?

A: Both materials are suitable for linear potentiometer applications. Cermet material in the substitute provides enhanced durability and temperature stability. The ±150ppm/°C temperature coefficient of the substitute is superior to typical conductive plastic specifications, though this parameter was not specified for the original component.

Q: Will the 2W power rating of the substitute cause any issues in a 0.5W application?

A: No. The higher power rating of the substitute provides additional thermal capacity and operational margin. The component will operate safely at the lower power dissipation level of the original application.

Q: Are there mechanical installation differences between these components?

A: Yes. The bushing thread differs (1/4-32 original versus 3/8-32 substitute) and the body is larger (0.500" x 0.500" versus 0.625" x 0.625"). Panel cutout dimensions and bushing hardware must be verified for compatibility before installation.

Q: Is the 300° rotation of the substitute adequate for applications designed for 295° rotation?

A: Yes. The 300° rotation of the substitute meets the 295° minimum requirement. The additional 5° of rotation provides equivalent or improved adjustment range.

Q: What is the packaging difference between these components?

A: The original Honeywell component is supplied without specified packaging. The Bourns substitute is supplied in Tray packaging format, which is standard for active production components.

Q: Are both components RoHS compliant?

A: Yes. The original Honeywell 308L10K is RoHS Compliant. The Bourns substitute is ROHS3 Compliant, representing current RoHS certification standards.