3329P-1-502LF Trimmer Potentiometer: Equivalent & Substitute Parts

Part Overview

The 3329P-1-502LF is a 5 kOhm, 0.5W through-hole trimmer potentiometer manufactured by Bourns Inc. as part of the Trimpot® 3329 sealed series. This component features cermet resistive material, top adjustment, and PC pin termination in a round 0.250" diameter package. The part is active and in production, with ROHS3 compliance and REACH affected status. Substitute parts become necessary when the primary part is unavailable, when packaging requirements differ, or when alternative manufacturers' inventory levels are more favorable for procurement.

Substiute Parts

3329P-1-502LF

Bourns Inc.In Stock: 10053329P-1-502LF Datasheet

Current PartRFQ

25PR5KLF

TT Electronics/BIIn Stock: 941625PR5KLF Datasheet

SimilarRFQ

72PMR5KLF

TT Electronics/BIIn Stock: 487072PMR5KLF Datasheet

SimilarRFQ

82PR5KLF

TT Electronics/BIIn Stock: 268882PR5KLF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 3329P-1-502LF is determined by strict equivalence across the following parameters: resistance value (5 kOhms), power rating (0.5W), tolerance (±10%), temperature coefficient (±100ppm/°C), number of turns (1), adjustment type (top adjustment), resistive material (cermet), mounting type (through hole), and termination style (PC pins). All three substitute parts—25PR5KLF, 72PMR5KLF, and 82PR5KLF—meet these core electrical and functional requirements. Physical dimensions vary among substitutes, which may affect mechanical fit in specific PCB layouts. Packaging format (tube versus bulk) differs but does not impact electrical performance.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts maintain full electrical equivalence to the 3329P-1-502LF across resistance, power rating, tolerance, temperature coefficient, and functional characteristics. Selection among substitutes should be based on mechanical fit requirements and compliance considerations.

The 82PR5KLF offers the closest mechanical compatibility, matching the round 0.250" diameter footprint of the original part while providing ROHS3 compliance and REACH unaffected status. This part is suitable for direct replacement in existing PCB layouts designed for the 3329P-1-502LF.

The 25PR5KLF features a square 0.270" x 0.270" footprint and maintains RoHS compliance with REACH unaffected status. This part requires PCB layout verification due to its different physical geometry.

The 72PMR5KLF has a larger square 0.375" x 0.375" footprint and is supplied in bulk packaging. This part requires significant PCB layout modification and is suitable only when space constraints are not a limiting factor.

Frequently Asked Questions (FAQ)

Q: Can the 82PR5KLF directly replace the 3329P-1-502LF without PCB modification?

A: Yes. The 82PR5KLF matches the round 0.250" diameter package of the 3329P-1-502LF and maintains identical electrical specifications. No PCB layout changes are required.

Q: What is the primary difference between the 25PR5KLF and 72PMR5KLF?

A: Both parts are electrically equivalent to the 3329P-1-502LF. The 25PR5KLF has a smaller square footprint (0.270" x 0.270") and is supplied in tube packaging. The 72PMR5KLF has a larger square footprint (0.375" x 0.375") and is supplied in bulk packaging. Physical dimensions differ, requiring PCB layout verification for each.

Q: Are all substitute parts ROHS3 compliant?

A: The 82PR5KLF and 72PMR5KLF are ROHS3 compliant. The 25PR5KLF is RoHS compliant but not specifically ROHS3 certified. Verify compliance requirements for your application.

Q: What does REACH Unaffected status mean?

A: REACH Unaffected status indicates the part does not contain substances of very high concern (SVHC) listed under REACH regulations. The 3329P-1-502LF is REACH Affected, meaning it may contain listed substances. The three substitute parts are all REACH Unaffected, which may be advantageous for certain regulatory environments.

Q: Can I use the 72PMR5KLF in a space-constrained application?

A: The 72PMR5KLF has a larger footprint (0.375" x 0.375") compared to the original part (0.250" diameter). Use only if your PCB layout can accommodate the increased size.