3386U-1-203R Equivalent & Substitute Parts

Part Overview

The Bourns 3386U-1-203R is a 20 kOhm, 0.5W through-hole trimmer potentiometer with top adjustment, PC pin termination, and cermet resistive material. This sealed Trimpot® 3386 series component is currently active in production. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and design continuity when the primary part becomes unavailable or when alternative packaging or compliance requirements necessitate component substitution.

Substiute Parts

3386U-1-203R

Bourns Inc.In Stock: 8663386U-1-203R Datasheet

Current PartRFQ

25PR20KLF

TT Electronics/BIIn Stock: 266225PR20KLF Datasheet

SimilarRFQ

M63P203KB40

Vishay SpectrolIn Stock: 1013M63P203KB40 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 3386U-1-203R is determined by matching the following critical parameters: 20 kOhm resistance value, 0.5W power rating, ±10% tolerance, ±100ppm/°C temperature coefficient, 1-turn adjustment, cermet resistive material, through-hole mounting, and PC pin termination. Differences in adjustment type (top vs. side), physical dimensions, packaging format, and compliance certifications do not preclude functional substitution when circuit board layout and mechanical constraints permit. The identified substitute parts meet all electrical and material specifications required for direct functional replacement.

Parameter Comparison

Engineering Selection Recommendations

The 25PR20KLF (TT Electronics/BI) provides electrical and mechanical equivalence with the primary advantage of RoHS compliance and REACH unaffected status, making it suitable for applications requiring modern environmental compliance. Its smaller physical footprint (6.86mm vs. 9.53mm) requires verification of available circuit board space. The M63P203KB40 (Vishay Spectrol) offers ROHS3 compliance and a larger footprint (10.03mm) but features side adjustment rather than top adjustment, necessitating mechanical clearance verification and potential adjustment access redesign. Selection between substitutes depends on compliance requirements, available board space, and adjustment accessibility constraints specific to the application.

Frequently Asked Questions (FAQ)

Q: Can the 25PR20KLF replace the 3386U-1-203R directly on the circuit board? A: Electrical substitution is valid. Physical substitution requires verification that the smaller footprint (6.86mm vs. 9.53mm) fits available board space and that top adjustment access is maintained.

Q: What is the primary difference between the M63P203KB40 and the 3386U-1-203R? A: Both parts are electrically equivalent. The M63P203KB40 features side adjustment instead of top adjustment and has a larger physical dimension (10.03mm vs. 9.53mm). Circuit board layout and adjustment access must be evaluated before substitution.

Q: Are all three parts functionally interchangeable? A: All three parts meet identical electrical specifications (20 kOhm, 0.5W, ±10%, ±100ppm/°C, 1-turn, cermet, through-hole, PC pins). Substitution is functionally valid when physical dimensions and adjustment type compatibility are confirmed for the specific application.

Q: Does RoHS compliance affect electrical performance? A: RoHS compliance status does not alter electrical performance. The 25PR20KLF and M63P203KB40 are RoHS compliant alternatives suitable for applications with environmental compliance requirements.

Q: What packaging considerations apply to these substitutes? A: The 3386U-1-203R is supplied in Tape & Reel format. The 25PR20KLF is supplied in Tube packaging, and the M63P203KB40 is supplied in Bulk packaging. Procurement and handling procedures may differ accordingly.