3386M-1-502 Trimmer Potentiometer Equivalent & Substitute Parts

Part Overview

The Bourns 3386M-1-502 is a 5 kOhm, 0.5W through-hole trimmer potentiometer with PC pin termination and top adjustment. This sealed Trimpot® 3386 series component is designed for applications requiring precision resistance adjustment in compact form factors. The part is currently active in production. Equivalent and substitute parts are identified based on matching electrical specifications, mechanical compatibility, and functional performance within the allowed parameter tolerances for this product category.

Substiute Parts

3386M-1-502

Bourns Inc.In Stock: 25213386M-1-502 Datasheet

Current PartRFQ

25PR5KLF

TT Electronics/BIIn Stock: 941625PR5KLF Datasheet

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72PMR5KLF

TT Electronics/BIIn Stock: 487072PMR5KLF Datasheet

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72PR5KLF

TT Electronics/BIIn Stock: 190172PR5KLF Datasheet

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82PR5KLF

TT Electronics/BIIn Stock: 268882PR5KLF Datasheet

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M63P502KB40

Vishay SpectrolIn Stock: 1053M63P502KB40 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 3386M-1-502 are qualified based on the following critical parameters:

• Resistance value: 5 kOhms
• Power rating: 0.5W (1/2W)
• Tolerance: ±10%
• Temperature coefficient: ±100ppm/°C
• Number of turns: 1
• Resistive material: Cermet
• Mounting type: Through hole
• Termination style: PC pins

Substitutes are grouped into two categories:

Category A - Direct Mechanical Equivalents: Parts with identical or compatible physical dimensions (0.375" x 0.375" square face) and top adjustment configuration. These include 72PMR5KLF and 72PR5KLF from TT Electronics/BI.

Category B - Functional Equivalents with Dimensional Variation: Parts meeting all electrical specifications but with different physical form factors or adjustment mechanisms. These include 25PR5KLF (smaller square form), 82PR5KLF (round form), and M63P502KB40 (side adjustment variant).

Parameter Comparison

Engineering Selection Recommendations

For direct replacement with identical form factor: 72PMR5KLF and 72PR5KLF are functionally and mechanically equivalent to the 3386M-1-502, both maintaining the 0.375" x 0.375" square footprint and top adjustment configuration. Both parts are ROHS3 compliant, addressing regulatory requirements where the original part is non-compliant.

For space-constrained applications: 25PR5KLF provides a smaller footprint (0.270" x 0.270") while maintaining all electrical specifications and top adjustment. This part is RoHS compliant and suitable for designs requiring reduced PCB area.

For alternative form factors: 82PR5KLF offers a round configuration (0.250" diameter) with identical electrical performance and top adjustment, providing design flexibility for circular mounting patterns.

For side-adjustment applications: M63P502KB40 from Vishay Spectrol maintains all electrical specifications but features side adjustment and a slightly larger square footprint (0.395" x 0.395"). This part is ROHS3 compliant and suitable where side-mounted adjustment is preferred.

All substitute parts maintain the 1-turn, cermet resistive element, and PC pin termination of the original specification.

Frequently Asked Questions (FAQ)

Q: Can 25PR5KLF replace 3386M-1-502 in existing designs? A: Yes, provided PCB layout accommodates the smaller 0.270" x 0.270" footprint. All electrical parameters are identical. Verify mounting hole spacing compatibility before implementation.

Q: What is the primary difference between 72PMR5KLF and 72PR5KLF? A: Both parts are mechanically and electrically identical with 0.375" x 0.375" square form factor and top adjustment. The primary difference is packaging: 72PMR5KLF is supplied in bulk, while 72PR5KLF is also supplied in bulk. Verify packaging requirements for procurement.

Q: Is M63P502KB40 compatible with designs requiring top adjustment? A: No. M63P502KB40 features side adjustment, not top adjustment. This part is suitable only for applications where side-mounted adjustment is acceptable or preferred.

Q: Why is 82PR5KLF round while others are square? A: 82PR5KLF is designed for applications requiring circular mounting patterns or space optimization in round PCB layouts. All electrical specifications remain identical to square variants.

Q: Are all substitute parts RoHS compliant? A: 72PMR5KLF, 72PR5KLF, 82PR5KLF, and M63P502KB40 are ROHS3 compliant. 25PR5KLF is RoHS compliant. The original 3386M-1-502 is RoHS non-compliant.

Q: Can I use these substitutes interchangeably on the same PCB? A: Only 72PMR5KLF and 72PR5KLF are directly interchangeable due to identical footprints and adjustment type. Other substitutes require PCB layout modifications to accommodate different dimensions or adjustment mechanisms.