Bourns 3329U-1-502RLF Trimmer Potentiometer: Equivalent & Substitute Parts

Part Overview

The Bourns 3329U-1-502RLF is a 5 kOhm, 0.5W through-hole trimmer potentiometer with PC pin termination and top adjustment. This sealed Trimpot® 3329 series component is actively manufactured and ROHS3 compliant. Substitute parts are necessary when the primary part is unavailable, when specific packaging requirements differ, or when alternative form factors better suit board layout constraints while maintaining electrical equivalence.

Substiute Parts

3329U-1-502RLF

Bourns Inc.In Stock: 7793329U-1-502RLF 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

Electrical substitution is determined by matching 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 listed substitute parts meet these electrical and mechanical criteria. Physical form factor differences (round versus square body, dimensional variations) do not affect electrical performance but may impact PCB layout compatibility. Packaging format (Tape & Reel, Tube, Bulk) affects procurement and handling but not component function.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts are actively manufactured and meet the core electrical specifications. The 82PR5KLF maintains identical round form factor (0.250" diameter) to the primary part, making it the most direct mechanical substitute. The 25PR5KLF offers a smaller square footprint (0.270" x 0.270") suitable for space-constrained layouts. The 72PMR5KLF provides a larger square body (0.375" x 0.375") for applications requiring enhanced thermal dissipation or easier manual adjustment access.

Compliance considerations: The primary part is ROHS3 compliant and REACH affected. The 82PR5KLF and 72PMR5KLF are ROHS3 compliant with REACH unaffected status. The 25PR5KLF is RoHS compliant (standard) with REACH unaffected status. Packaging format selection depends on procurement workflow: Tape & Reel for automated assembly, Tube for moderate-volume manual placement, and Bulk for high-volume operations.

Frequently Asked Questions (FAQ)

Q: Can I substitute the 3329U-1-502RLF with any of these parts without circuit redesign?

A: Yes. All substitute parts share identical electrical parameters: 5 kOhm resistance, 0.5W power rating, ±10% tolerance, ±100ppm/°C temperature coefficient, single-turn top adjustment, cermet resistive material, through-hole mounting, and PC pin termination. Electrical performance is equivalent.

Q: What are the physical differences between substitute options?

A: The 82PR5KLF matches the primary part's round form factor (0.250" diameter). The 25PR5KLF uses a smaller square body (0.270" x 0.270"). The 72PMR5KLF uses a larger square body (0.375" x 0.375"). Form factor selection depends on available PCB space and layout constraints.

Q: How do packaging formats differ?

A: Tape & Reel (3329U-1-502RLF) is optimized for automated pick-and-place assembly. Tube (25PR5KLF) suits moderate-volume manual or semi-automated placement. Bulk (72PMR5KLF, 82PR5KLF) is used for high-volume operations or manual assembly. Electrical and mechanical function remains unchanged across packaging formats.

Q: Are there compliance differences I should consider?

A: The primary part is ROHS3 compliant and REACH affected. The 82PR5KLF and 72PMR5KLF are ROHS3 compliant with REACH unaffected status. The 25PR5KLF is RoHS compliant with REACH unaffected status. Verify compliance requirements for your specific application and regulatory jurisdiction.

Q: Which substitute offers the best thermal performance?

A: The 72PMR5KLF has the largest body dimension (0.375" x 0.375"), which provides increased surface area for heat dissipation. However, all parts share the same 0.5W power rating and cermet material, so thermal performance differences are minimal under rated operating conditions.

Q: Can I mix these parts in the same production run?

A: Yes, provided your assembly process accommodates the different form factors. Round parts (3329U-1-502RLF, 82PR5KLF) require different pick-and-place tooling than square parts (25PR5KLF, 72PMR5KLF). Verify your assembly equipment compatibility before mixing form factors in a single production batch.