Equivalent & Substitute Parts for 3329P-DK9-203

Part Overview

The Bourns 3329P-DK9-203 is a 20 kOhm, 0.5W through-hole trimmer potentiometer with PC pin termination and top adjustment. This sealed Trimpot® 3329 series component is designed for applications requiring precision resistance adjustment in compact form factors. The part is currently active in production with 844 units in stock. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when specific compliance requirements necessitate alternative components.

Substiute Parts

3329P-DK9-203

Bourns Inc.In Stock: 9303329P-DK9-203 Datasheet

Current PartRFQ

25PR20KLF

TT Electronics/BIIn Stock: 266225PR20KLF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 3329P-DK9-203 is determined by the following critical parameters:

• Electrical Specifications: Resistance value (20 kOhms), power rating (0.5W), tolerance (±10%), and temperature coefficient (±100ppm/°C) must match exactly
• Functional Design: Number of turns (1), adjustment type (top adjustment), and resistive material (cermet) must be identical
• Physical Interface: Mounting type (through hole), termination style (PC pins), and footprint compatibility must be maintained

The substitute part 25PR20KLF meets all electrical and functional requirements. Physical dimensions differ slightly (square 0.270" × 0.270" face versus round 0.250" diameter), but both maintain PC pin through-hole compatibility for standard PCB layouts.

Parameter Comparison

Engineering Selection Recommendations

Both the 3329P-DK9-203 and 25PR20KLF are active production components with identical electrical and functional specifications. Selection between these parts should be based on the following factors:

RoHS Compliance: The 25PR20KLF is RoHS compliant, while the 3329P-DK9-203 is RoHS non-compliant. Applications subject to RoHS regulations must use the 25PR20KLF.

Physical Footprint: The 3329P-DK9-203 features a round body (0.250" diameter), while the 25PR20KLF has a square body (0.270" × 0.270" face). PCB layout and mechanical clearance requirements determine which form factor is suitable.

Availability: The 25PR20KLF has higher inventory availability (2646 units versus 844 units), making it preferable for high-volume procurement.

REACH Status: The 3329P-DK9-203 is REACH Affected, while the 25PR20KLF is REACH Unaffected. Supply chain and regulatory requirements may influence part selection.

Frequently Asked Questions (FAQ)

Q: Can the 25PR20KLF directly replace the 3329P-DK9-203 in existing designs?

A: Yes, provided that the physical footprint difference (round versus square body) does not conflict with PCB layout constraints. Both parts share identical electrical specifications, PC pin termination, and through-hole mounting compatibility.

Q: What is the significance of the RoHS compliance difference?

A: RoHS compliance is mandatory for products sold in the European Union and certain other markets. If your application is subject to RoHS regulations, the 25PR20KLF must be used. The 3329P-DK9-203 is not suitable for RoHS-regulated applications.

Q: Are there any electrical performance differences between these parts?

A: No. Both parts have identical resistance (20 kOhms), power rating (0.5W), tolerance (±10%), temperature coefficient (±100ppm/°C), and resistive material (cermet). Electrical performance is equivalent.

Q: Does the physical size difference affect circuit performance?

A: Physical dimensions do not affect electrical performance. However, the square body of the 25PR20KLF (0.270" × 0.270") requires slightly more PCB space than the round body of the 3329P-DK9-203 (0.250" diameter). Verify mechanical clearance in your specific layout.

Q: What packaging options are available?

A: The 3329P-DK9-203 packaging is not specified in the available data. The 25PR20KLF is supplied in tube packaging, suitable for automated assembly processes.