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

Part Overview

The Bourns 3339P-1-503 is a 50 kOhm, 0.5W through-hole trimmer potentiometer with PC pin termination and top adjustment. This sealed Trimpot® 3339 series component is designed for applications requiring precision resistance adjustment in compact form factors. The part is currently active in production. Substitute parts may be required due to RoHS compliance requirements, inventory availability, or specific application certifications.

Substiute Parts

3339P-1-503

Bourns Inc.In Stock: 9003339P-1-503 Datasheet

Current PartRFQ

3339P-1-503LF

Bourns Inc.In Stock: 12443339P-1-503LF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The 3339P-1-503LF is a direct substitute for the 3339P-1-503 based on identical electrical and mechanical parameters. Substitution is valid when the following criteria are met:

• Resistance value: 50 kOhms (exact match)
• Power rating: 0.5W / 1/2W (exact match)
• Tolerance: ±10% (exact match)
• Temperature coefficient: ±100ppm/°C (exact match)
• Number of turns: 4 (exact match)
• Adjustment type: Top Adjustment (exact match)
• Resistive material: Cermet (exact match)
• Mounting type: Through Hole (exact match)
• Termination style: PC Pins (exact match)
• Physical size: Round - 0.300" Dia (7.62mm) (exact match)
• Series: Trimpot® 3339 - Sealed (exact match)

The primary difference between these parts is RoHS compliance status and lead-free termination designation (LF suffix).

Parameter Comparison

Engineering Selection Recommendations

The 3339P-1-503LF is the recommended substitute when RoHS3 compliance is required. Both parts are active products from Bourns Inc. and maintain identical electrical performance and mechanical compatibility. Selection between these parts should be based on regulatory requirements:

• Use 3339P-1-503LF for applications requiring RoHS3 compliance or lead-free termination
• Use 3339P-1-503 where RoHS compliance is not a requirement and legacy specifications are acceptable

Both parts carry REACH Affected status and EAR99 export classification. Moisture sensitivity level is identical at MSL 1 (Unlimited), indicating no special moisture handling requirements during storage or assembly.

Frequently Asked Questions (FAQ)

Q: Are the 3339P-1-503 and 3339P-1-503LF electrically interchangeable?

A: Yes. Both parts have identical resistance (50 kOhms), power rating (0.5W), tolerance (±10%), temperature coefficient (±100ppm/°C), and all other electrical specifications.

Q: What does the "LF" suffix indicate?

A: The LF suffix designates lead-free termination and indicates RoHS3 compliance. The 3339P-1-503LF uses lead-free solder-compatible PC pins.

Q: Can I use the 3339P-1-503LF as a direct replacement for the 3339P-1-503 in existing designs?

A: Yes. The parts are mechanically and electrically identical. The LF variant is a direct substitute with no design changes required.

Q: Are there any differences in physical dimensions or mounting?

A: No. Both parts are Round - 0.300" Dia (7.62mm) with identical through-hole PC pin termination and top adjustment configuration.

Q: What is the moisture sensitivity level for these parts?

A: Both parts have MSL 1 (Unlimited), meaning no special moisture control is required during storage, handling, or assembly.

Q: Are these parts subject to export restrictions?

A: Both parts are classified as EAR99 under export control regulations. REACH Affected status applies to both variants.