Honeywell 381L2500 Potentiometer - Equivalent & Substitute Parts

Part Overview

The Honeywell 381L2500 is a 2.5k Ohm 1 Watt linear panel mount potentiometer with conductive plastic resistive material and solder lug termination. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing system maintenance and new design implementations. The 381 series potentiometer features a 300° rotation angle, slotted actuator, and 1/4-32 bushing thread for standard panel mounting applications.

Substiute Parts

381L2500

Honeywell Sensing and Productivity SolutionsIn Stock: 979381L2500 Datasheet

Current PartRFQ

RES2K5E

OhmiteIn Stock: 962RES2K5E Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Honeywell 381L2500 is determined by the following critical parameters that must remain constant across equivalent components:

Mandatory Matching Parameters:

• Resistance value: 2.5k Ohm
• Tolerance: ±10%
• Taper characteristic: Linear
• Number of gangs: 1
• Number of turns: 1
• Rotation angle: 300°
• Termination style: Solder Lug
• Mounting type: Panel Mount
• Bushing thread: 1/4-32

Allowable Variation Parameters:

• Power rating: May be equal to or greater than 1W
• Resistive material: Conductive Plastic or Wirewound
• Body diameter: May vary within mechanical constraints
• Actuator length: May vary within mechanical constraints
• Product status: Active status preferred for availability

The Ohmite RES2K5E qualifies as a substitute part because it maintains all mandatory matching parameters while providing enhanced power handling capability (12.5W versus 1W) and active product status for continued availability.

Parameter Comparison

Engineering Selection Recommendations

The Ohmite RES2K5E serves as the primary substitute for the obsolete Honeywell 381L2500 potentiometer. Selection of this substitute is based on the following engineering criteria:

Compliance and Regulatory Status: Both components maintain RoHS compliance. The Ohmite RES2K5E carries ROHS3 Compliant status and REACH Unaffected designation, ensuring compatibility with current environmental and regulatory requirements.

Product Availability: The Honeywell 381L2500 is classified as obsolete, creating supply chain risk. The Ohmite RES2K5E maintains active product status with confirmed inventory availability (951 Pcs New Original In Stock), ensuring reliable procurement for replacement and new applications.

Electrical and Mechanical Compatibility: The RES2K5E maintains identical electrical specifications across all critical parameters: 2.5k Ohm resistance, ±10% tolerance, linear taper, 1 gang, 1 turn configuration, and 300° rotation angle. Mechanical compatibility is confirmed through identical solder lug termination, 1/4-32 bushing thread, slotted actuator type, and 0.125" actuator diameter.

Power Rating Enhancement: The substitute component provides 12.5W power rating compared to the original 1W specification. This increased capability provides additional thermal margin and operational flexibility without compromising any functional requirement of the original design.

Material Consideration: The RES2K5E employs wirewound resistive material in place of the original conductive plastic construction. Both materials deliver linear taper characteristics and maintain the specified tolerance and rotation angle. Wirewound construction in potentiometers provides established reliability in industrial applications.

Frequently Asked Questions (FAQ)

Q: Can the Ohmite RES2K5E directly replace the Honeywell 381L2500 in existing designs?

A: Yes. The RES2K5E maintains identical electrical specifications (2.5k Ohm, ±10% tolerance, linear taper, 1 turn, 300° rotation) and mechanical interface (solder lug termination, 1/4-32 bushing thread, slotted actuator, 0.125" diameter). Panel mounting compatibility is confirmed through identical bushing thread specification.

Q: What is the significance of the power rating difference (1W versus 12.5W)?

A: The original 381L2500 is rated for 1W continuous power dissipation. The RES2K5E is rated for 12.5W. This difference indicates the substitute component can safely handle higher power levels without thermal degradation. Applications operating within the original 1W specification will operate well within the thermal limits of the substitute component.

Q: Does the change from conductive plastic to wirewound material affect performance?

A: Both resistive materials deliver linear taper potentiometer function with identical electrical specifications. Wirewound construction is a standard alternative in potentiometer design and provides established performance in industrial applications. The 300° rotation angle and ±10% tolerance are maintained in both constructions.

Q: Are there any compliance or certification differences between these components?

A: Both components are RoHS compliant. The Honeywell 381L2500 carries RoHS Compliant status. The Ohmite RES2K5E carries ROHS3 Compliant status and REACH Unaffected designation, meeting current environmental regulatory requirements.

Q: Why is product status important in this substitution?

A: The Honeywell 381L2500 is classified as obsolete, indicating discontinued manufacturing and limited availability. The Ohmite RES2K5E maintains active product status with confirmed inventory, ensuring reliable procurement for both replacement applications and new designs.

Q: Are the physical dimensions compatible with existing panel cutouts and mounting hardware?

A: The 1/4-32 bushing thread specification is identical between both components, confirming compatibility with existing panel mounting hardware. The slotted actuator type and 0.125" actuator diameter are also identical, ensuring compatibility with existing control knobs and adjustment mechanisms.

Q: What is the packaging difference between these components?

A: The Honeywell 381L2500 is supplied in standard packaging. The Ohmite RES2K5E is supplied in bulk packaging. Both formats are suitable for component procurement; bulk packaging may offer cost advantages for higher-volume applications.