Bourns 3299Y-1-503 Trimmer Potentiometer: Equivalent & Substitute Parts

Part Overview

The Bourns 3299Y-1-503 is a 50 kOhm, 0.5W through-hole trimmer potentiometer with PC pin termination and top adjustment. This sealed Trimpot® 3299 series component is designed for precision resistance adjustment in electronic circuits requiring cermet resistive elements and 25-turn adjustment capability. The part is currently active in production with 721 units in stock. Substitute parts are necessary when addressing RoHS compliance requirements, managing inventory constraints, or accommodating minor dimensional variations within the same electrical specification range.

Substiute Parts

3299Y-1-503

Bourns Inc.In Stock: 7723299Y-1-503 Datasheet

Current PartRFQ

3296Y-1-503

Bourns Inc.In Stock: 11763296Y-1-503 Datasheet

DirectRFQ

3299Y-1-503LF

Bourns Inc.In Stock: 19863299Y-1-503LF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 3299Y-1-503 is determined by strict equivalence across the following critical parameters: resistance value (50 kOhms), power rating (0.5W), tolerance (±10%), temperature coefficient (±100ppm/°C), number of turns (25), adjustment type (top adjustment), resistive material (cermet), mounting type (through hole), and termination style (PC pins).

Two substitute parts meet these criteria:

3299Y-1-503LF: Identical electrical and mechanical specifications to the main part, with the primary distinction being RoHS3 compliance status versus the non-compliant status of 3299Y-1-503. Dimensional specifications are identical (0.375" x 0.240" face).

3296Y-1-496: Shares all critical electrical parameters with the main part. The primary difference is dimensional: the 3296Y series has a smaller face dimension (0.375" x 0.190" versus 0.375" x 0.240"), representing a different mechanical form factor within the same Trimpot® sealed family. All electrical and functional characteristics remain equivalent.

Parameter Comparison

Engineering Selection Recommendations

3299Y-1-503LF is the direct functional equivalent with identical dimensions and electrical specifications. Selection of this part is appropriate when RoHS3 compliance is required for the application or end-market. Inventory availability is higher (1921 units) compared to the main part.

3296Y-1-503 provides electrical equivalence with a reduced face dimension (0.190" versus 0.240" height). This part is suitable for applications where space constraints favor a more compact form factor, provided that the printed circuit board layout accommodates the smaller mechanical envelope. All electrical performance parameters remain unchanged.

Selection between these substitutes depends on compliance requirements and available board space. Both parts maintain identical electrical performance and functional characteristics as the main part number.

Frequently Asked Questions (FAQ)

Q: Can 3299Y-1-503LF be used as a direct replacement for 3299Y-1-503?

A: Yes. The 3299Y-1-503LF is electrically and mechanically identical to the 3299Y-1-503, with the distinction that it meets RoHS3 compliance requirements. Both parts share the same face dimensions, resistance value, power rating, tolerance, temperature coefficient, and all other specified parameters.

Q: What is the primary difference between 3299Y-1-503 and 3296Y-1-503?

A: The primary difference is the face dimension. The 3299Y-1-503 has a 0.375" x 0.240" face, while the 3296Y-1-503 has a 0.375" x 0.190" face. All electrical specifications—resistance, power rating, tolerance, temperature coefficient, and number of turns—are identical. The 3296Y series represents a more compact form factor within the Trimpot® sealed family.

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

A: No. All three parts share identical electrical specifications: 50 kOhms resistance, 0.5W power rating, ±10% tolerance, ±100ppm/°C temperature coefficient, 25-turn adjustment, cermet resistive material, and top adjustment type.

Q: Which substitute should be selected for a space-constrained application?

A: The 3296Y-1-503 offers a reduced height dimension (0.190" versus 0.240"), making it suitable for compact layouts. Verify that the printed circuit board design accommodates this smaller mechanical envelope before selection.

Q: Does RoHS compliance affect electrical performance?

A: No. RoHS compliance status reflects manufacturing and material sourcing practices but does not alter the electrical characteristics or functional performance of the component.