Honeywell 381N2500 Potentiometer: Equivalent & Substitute Parts

Part Overview

The Honeywell 381N2500 is a 2.5k Ohm 1 Watt linear panel mount potentiometer featuring conductive plastic resistive material, slotted actuator, and solder lug termination. This component is classified as obsolete, necessitating identification of active substitute parts for new designs and ongoing production requirements. The part maintains full RoHS compliance and unlimited moisture sensitivity rating, making it suitable for industrial control and instrumentation applications.

Substiute Parts

381N2500

Honeywell Sensing and Productivity SolutionsIn Stock: 1124381N2500 Datasheet

Current PartRFQ

1-1624200-9

TE Connectivity Passive ProductIn Stock: 10181-1624200-9 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Honeywell 381N2500 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Resistance value: 2.5k Ohm
• Power rating: 1W
• Taper characteristic: Linear
• Number of gangs: 1
• Termination style: Solder Lug
• Mounting configuration: Panel Mount
• Tolerance: ±10%
• Number of turns: 1

Allowable Variations: Substitute parts may differ in resistive material composition (conductive plastic versus wirewound), actuator diameter, bushing thread size, body diameter, rotation angle (within 5° tolerance), and temperature coefficient specifications, provided all mandatory parameters remain equivalent.

The TE Connectivity Passive Product part number 1-1624200-9 qualifies as a substitute based on matching all mandatory parameters while employing wirewound resistive material technology instead of conductive plastic.

Parameter Comparison

Engineering Selection Recommendations

Honeywell 381N2500 (Main Part): This component is obsolete and no longer in active production. While 1108 units remain in inventory as new original stock, long-term availability cannot be assured. The part maintains full RoHS compliance and is suitable for existing designs requiring conductive plastic potentiometer technology with minimal actuator diameter.

TE Connectivity 1-1624200-9 (Substitute): This part is in active production status with 951 units available as new original stock. It provides functional equivalence across all critical electrical parameters (resistance, power, tolerance, taper, termination) and mechanical mounting requirements (panel mount, solder lug). The wirewound resistive material offers defined temperature coefficient performance (±100ppm/°C) compared to the unspecified coefficient of the Honeywell part.

Selection Basis: Substitution is valid when circuit design accommodates the larger actuator diameter (0.250" versus 0.125"), different bushing thread size (3/8-32 versus 1/4-32), and increased body diameter (0.925" versus 0.625"). The 5° rotation difference (295° versus 300°) is within acceptable mechanical tolerance for linear potentiometer applications. The TE part's active production status ensures continued availability for future procurement cycles.

Frequently Asked Questions (FAQ)

Q: Can the TE Connectivity 1-1624200-9 directly replace the Honeywell 381N2500 in existing assemblies?

A: Direct mechanical replacement requires verification of panel cutout dimensions and bushing thread compatibility. The TE part features a larger body diameter (0.925" versus 0.625") and different bushing thread (3/8-32 versus 1/4-32). Electrical function is equivalent for all circuit applications requiring 2.5k Ohm 1W linear potentiometer performance.

Q: What is the significance of the resistive material difference between conductive plastic and wirewound?

A: Both materials achieve the specified 2.5k Ohm resistance and 1W power rating with ±10% tolerance. Wirewound construction (TE part) provides specified temperature coefficient performance (±100ppm/°C). Conductive plastic construction (Honeywell part) does not specify temperature coefficient. Material selection depends on application temperature stability requirements.

Q: Are there mechanical constraints that prevent substitution?

A: Yes. The actuator diameter differs significantly (0.250" TE versus 0.125" Honeywell), affecting knob compatibility and panel interface design. The bushing thread size differs (3/8-32 versus 1/4-32), requiring different panel mounting hardware. The body diameter is larger on the TE part (0.925" versus 0.625"), affecting panel layout spacing. These differences require mechanical redesign for substitution.

Q: Does the 5° rotation difference affect circuit performance?

A: The rotation difference (295° TE versus 300° Honeywell) is within acceptable mechanical tolerance for linear potentiometer applications. Both parts provide single-turn linear adjustment across their respective rotation ranges. Circuit performance is equivalent for standard control and instrumentation applications.

Q: What is the compliance status of each part?

A: The Honeywell 381N2500 is RoHS Compliant. The TE Connectivity 1-1624200-9 lists RoHS Status as "Not Applicable," indicating it may not be subject to RoHS requirements or compliance status is vendor-undefined. Design requirements for RoHS compliance should be verified with TE Connectivity for the substitute part.

Q: Why is the Honeywell part classified as obsolete?

A: Obsolete classification indicates the part is no longer in active production. While current inventory of 1108 units exists, future availability is not guaranteed. The TE Connectivity substitute part maintains active production status, ensuring long-term procurement availability for new designs and production continuity.