Bourns 3339W-1-503 Trimmer Potentiometer Equivalent & Substitute Parts

Part Overview

The Bourns 3339W-1-503 is a 50 kOhm, 0.5W through-hole trimmer potentiometer with PC pin termination and side adjustment capability. This sealed Trimpot® 3339 series component is currently active in production. Finding equivalent or substitute parts may be necessary due to inventory availability, lead time requirements, or specific compliance needs for your application.

Substiute Parts

3339W-1-503

Bourns Inc.In Stock: 8463339W-1-503 Datasheet

Current PartRFQ

3339W-1-503LF

Bourns Inc.In Stock: 11803339W-1-503LF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 3339W-1-503 is determined by strict equivalence across all critical electrical and mechanical parameters. The substitute part must match:

• Resistance value: 50 kOhms
• Power rating: 0.5W
• Tolerance: ±10%
• Temperature coefficient: ±100ppm/°C
• Number of turns: 4
• Adjustment type: Side Adjustment
• Resistive material: Cermet
• Mounting type: Through Hole
• Termination style: PC Pins
• Physical dimensions: Rectangular - 0.375" x 0.320" Face
• Series family: Trimpot® 3339 - Sealed

The 3339W-1-503LF meets all these criteria and is classified as a direct manufacturer substitute.

Parameter Comparison

Engineering Selection Recommendations

Both the 3339W-1-503 and 3339W-1-503LF are active production parts from Bourns Inc. with identical electrical and mechanical specifications. The primary distinction is RoHS compliance status: the 3339W-1-503 is RoHS non-compliant, while the 3339W-1-503LF is ROHS3 compliant.

Selection between these parts should be based on your application's regulatory requirements. If RoHS3 compliance is mandated by your design specifications, procurement standards, or end-market regulations, the 3339W-1-503LF is the appropriate choice. Both parts are REACH Affected and carry the same ECCN (EAR99) and HTSUS (8533.40.8050) classifications.

Frequently Asked Questions (FAQ)

Q: Can the 3339W-1-503LF be used as a direct replacement for the 3339W-1-503?

A: Yes. All electrical parameters, mechanical dimensions, and functional characteristics are identical. The only difference is RoHS compliance status. Substitution is valid from an engineering standpoint if your application does not require RoHS non-compliant components.

Q: What does the "LF" suffix in 3339W-1-503LF indicate?

A: The "LF" suffix typically indicates lead-free termination and RoHS3 compliance. This is the primary distinguishing factor between the two part numbers.

Q: Are there any dimensional differences between these parts?

A: No. Both parts have identical rectangular dimensions of 0.375" x 0.320" face (9.53mm x 8.13mm) and are packaged in tubes.

Q: Do these parts have the same moisture sensitivity level?

A: Yes. Both parts have Moisture Sensitivity Level 1 (Unlimited), indicating no moisture sensitivity constraints for storage or handling.

Q: Which part should I specify for new designs?

A: Selection depends on your regulatory environment. For applications requiring RoHS3 compliance, specify the 3339W-1-503LF. For applications with no RoHS requirements, either part is acceptable based on availability and lead time.