Bourns 3299X-1-504 Trimmer Potentiometer Equivalent & Substitute Parts

Part Overview

The Bourns 3299X-1-504 is a 500 kOhms, 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 resistance adjustment in compact form factors. The part is currently active in production with 923 units in stock. Alternative equivalent parts may be required due to RoHS compliance requirements, supply chain considerations, or specific application certifications.

Substiute Parts

3299X-1-504

Bourns Inc.In Stock: 9713299X-1-504 Datasheet

Current PartRFQ

3299X-1-504LF

Bourns Inc.In Stock: 9343299X-1-504LF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 3299X-1-504 is determined by strict equivalence across the following critical parameters:

• Resistance value: 500 kOhms (exact match required)
• Power rating: 0.5W / 1/2W (exact match required)
• Tolerance: ±10% (exact match required)
• Temperature coefficient: ±100ppm/°C (exact match required)
• Number of turns: 25 (exact match required)
• Adjustment type: Side Adjustment (exact match required)
• Resistive material: Cermet (exact match required)
• Mounting type: Through Hole (exact match required)
• Termination style: PC Pins (exact match required)
• Physical dimensions: Rectangular - 0.395" x 0.240" Face (exact match required)
• Series: Trimpot® 3299 - Sealed (exact match required)

The identified substitute part maintains full electrical and mechanical compatibility with the original specification.

Parameter Comparison

Engineering Selection Recommendations

Both the 3299X-1-504 and 3299X-1-504LF are active production parts manufactured by Bourns Inc. with identical electrical and mechanical specifications. The primary distinction is RoHS compliance status: the 3299X-1-504LF carries ROHS3 certification, while the 3299X-1-504 is RoHS non-compliant. Selection between these parts should be based on regulatory requirements applicable to the end application. Both parts are REACH Affected and carry the same ECCN (EAR99) and HTSUS (8533.40.8050) classifications. Inventory availability is comparable for both variants.

Frequently Asked Questions (FAQ)

Q: Can the 3299X-1-504LF directly replace the 3299X-1-504 in existing designs?

A: Yes. The 3299X-1-504LF is electrically and mechanically equivalent to the 3299X-1-504. Both parts share identical resistance value, power rating, tolerance, temperature coefficient, number of turns, adjustment type, resistive material, mounting type, termination style, and physical dimensions. Direct substitution is supported without circuit modification.

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

A: The primary difference is RoHS compliance. The 3299X-1-504LF is ROHS3 compliant, while the 3299X-1-504 is RoHS non-compliant. All other electrical and mechanical parameters are identical.

Q: Which part should be selected for new designs?

A: Selection depends on regulatory requirements. For applications subject to RoHS directives or customer specifications requiring RoHS compliance, the 3299X-1-504LF is the appropriate choice. For applications without RoHS requirements, either part is suitable based on availability and supply chain considerations.

Q: Are the physical dimensions identical between both parts?

A: Yes. Both parts have identical rectangular dimensions of 0.395" x 0.240" face (10.03mm x 6.10mm), ensuring identical PCB footprint and mounting compatibility.

Q: What is the packaging format for both parts?

A: Both the 3299X-1-504 and 3299X-1-504LF are supplied in tube packaging.