RA20NASD103A Equivalent & Substitute Parts

Part Overview

The RA20NASD103A is a 10k Ohm 2W wirewound linear panel mount potentiometer manufactured by Honeywell Sensing and Productivity Solutions. This component features a single-turn design with solder lug termination and is rated for 300° rotation. The product is currently obsolete, necessitating identification of functionally equivalent alternatives for ongoing system support and new designs requiring similar electrical and mechanical characteristics.

Substiute Parts

RA20NASD103A

Honeywell Sensing and Productivity SolutionsIn Stock: 898RA20NASD103A Datasheet

Current PartRFQ

3852A-282-103AL

Bourns Inc.In Stock: 22193852A-282-103AL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RA20NASD103A is determined by strict equivalence across the following critical parameters:

Electrical Parameters: Resistance value (10k Ohm), power rating (2W), tolerance (±10%), and taper type (Linear) must match exactly.

Mechanical Parameters: Single-turn design, solder lug termination, panel mount configuration, 3/8-32 bushing thread, slotted actuator type, and actuator dimensions (0.875" length, 0.250" diameter) must be maintained.

Functional Parameters: Single gang configuration and user-defined adjustment type must be preserved.

The substitute part 3852A-282-103AL meets all critical electrical and mechanical requirements. Differences in resistive material composition (cermet versus wirewound), body diameter, rotation angle, and compliance certifications do not preclude functional substitution when the above parameters are satisfied.

Parameter Comparison

Engineering Selection Recommendations

The 3852A-282-103AL from Bourns Inc. is a functional equivalent for the obsolete RA20NASD103A. Both components satisfy the core electrical and mechanical requirements: 10k Ohm resistance, 2W power rating, ±10% tolerance, linear taper, single-turn configuration, solder lug termination, and identical panel mount mechanical interfaces.

The 3852A-282-103AL offers the additional advantage of active product status, ensuring continued availability and supply chain reliability. The component is ROHS3 compliant and REACH affected, meeting current regulatory requirements for new designs and legacy system support.

The substitute part is available in bulk packaging with 2200 pieces in stock, compared to 840 pieces of the obsolete RA20NASD103A.

Frequently Asked Questions (FAQ)

Q: Can the 3852A-282-103AL directly replace the RA20NASD103A in existing applications?

A: Yes. Both components share identical electrical specifications (10k Ohm, 2W, ±10% tolerance, linear taper) and mechanical interfaces (panel mount, 3/8-32 bushing thread, solder lug termination, matching actuator dimensions). The components are mechanically and electrically interchangeable for circuit board and panel mounting applications.

Q: What is the significance of the different resistive materials (wirewound versus cermet)?

A: Both wirewound and cermet resistive materials meet the specified 10k Ohm resistance, 2W power rating, and ±10% tolerance requirements. Cermet construction in the 3852A-282-103AL provides improved frequency response characteristics and reduced noise compared to wirewound designs, while maintaining equivalent DC performance.

Q: Why does the 3852A-282-103AL have a smaller body diameter (0.750" versus 1.125")?

A: The reduced body diameter of the 3852A-282-103AL does not affect substitution compatibility. Panel mount potentiometers are secured through the bushing thread (3/8-32 in both cases) and the actuator interface. The body diameter is a non-critical dimension for mechanical fit in standard panel cutouts designed for 3/8-32 threaded potentiometers.

Q: What is the impact of the 20° difference in rotation angle (300° versus 280°)?

A: The rotation angle difference does not preclude substitution. Both components are single-turn potentiometers with user-defined adjustment. The 280° rotation of the 3852A-282-103AL provides equivalent functional range for linear potentiometer applications. Applications requiring specific rotation angle specifications should be evaluated independently.

Q: Is the ROHS3 compliance of the 3852A-282-103AL relevant for legacy system support?

A: ROHS3 compliance of the substitute part is advantageous for new production runs and system updates. Legacy systems using the obsolete RA20NASD103A may be supported with the compliant 3852A-282-103AL without functional impact, as compliance status does not affect electrical or mechanical performance.

Q: Are there packaging considerations when transitioning from RA20NASD103A to 3852A-282-103AL?

A: The RA20NASD103A is supplied in unspecified packaging, while the 3852A-282-103AL is supplied in bulk packaging. Both are suitable for component-level integration. Bulk packaging of the substitute part supports higher-volume production requirements.