Bourns 3299X-1-500 Trimmer Potentiometer Equivalent & Substitute Parts

Part Overview

The Bourns 3299X-1-500 is a 50 Ohm, 0.5W through-hole trimmer potentiometer with PC pin termination and side adjustment capability. This sealed Trimpot® 3299 series component is designed for applications requiring precision variable resistance in compact rectangular form factors. The part is currently active in production with 1095 units available in stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity.

Substiute Parts

3299X-1-500

Bourns Inc.In Stock: 11123299X-1-500 Datasheet

Current PartRFQ

3299X-1-500LF

Bourns Inc.In Stock: 9543299X-1-500LF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 3299X-1-500 is determined by strict equivalence across all critical electrical and mechanical parameters. The following parameters must match identically for a part to qualify as a direct substitute:

• Resistance value: 50 Ohms
• Power rating: 0.5W (1/2W)
• Tolerance: ±10%
• Temperature coefficient: ±100ppm/°C
• Number of turns: 25
• Adjustment type: Side Adjustment
• Resistive material: Cermet
• Mounting type: Through Hole
• Termination style: PC Pins
• Physical dimensions: Rectangular - 0.395" x 0.240" Face (10.03mm x 6.10mm)
• Series: Trimpot® 3299 - Sealed

The 3299X-1-500LF meets all these criteria and is classified as a direct manufacturer equivalent. Differences in RoHS compliance status do not affect electrical or mechanical interchangeability.

Parameter Comparison

Engineering Selection Recommendations

Both the 3299X-1-500 and 3299X-1-500LF are active production parts manufactured by Bourns Inc. with identical electrical and mechanical specifications. Selection between these parts should be based on regulatory compliance requirements:

• 3299X-1-500: Select for applications where RoHS non-compliance is acceptable or where legacy component specifications are required.
• 3299X-1-500LF: Select for applications requiring ROHS3 compliance or where lead-free termination is mandated by design or regulatory standards.

Both parts carry REACH Affected status and EAR99 export classification. Inventory availability differs, with the 3299X-1-500 offering higher stock levels (1095 units) compared to the 3299X-1-500LF (858 units).

Frequently Asked Questions (FAQ)

Q: Are the 3299X-1-500 and 3299X-1-500LF electrically interchangeable?

A: Yes. Both parts have identical resistance values (50 Ohms), power ratings (0.5W), tolerance (±10%), temperature coefficients (±100ppm/°C), and all other electrical parameters. They are direct electrical equivalents.

Q: What is the difference between these two part numbers?

A: The primary difference is RoHS compliance status. The 3299X-1-500LF is ROHS3 compliant with lead-free termination, while the 3299X-1-500 is RoHS non-compliant. All other specifications, including physical dimensions, mounting type, and performance characteristics, are identical.

Q: Can I use the 3299X-1-500LF as a drop-in replacement for the 3299X-1-500?

A: Yes, provided your application or regulatory requirements do not prohibit the use of lead-free components. The mechanical and electrical compatibility is complete.

Q: Are there any packaging differences between these parts?

A: No. Both parts are supplied in tube packaging and have identical physical dimensions (Rectangular - 0.395" x 0.240" Face, 10.03mm x 6.10mm).

Q: Which part should I select for new designs?

A: For new designs, the 3299X-1-500LF is recommended due to ROHS3 compliance, which aligns with current environmental and regulatory standards. The 3299X-1-500 remains suitable for legacy or non-regulated applications.