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

Part Overview

The Bourns 3299Y-1-504 is a 500 kOhms, 0.5W through-hole trimmer potentiometer with PC pin termination and top adjustment. This sealed Trimpot® 3299 series component is designed for applications requiring precision resistance adjustment in compact rectangular form factors. The part is currently active in production with 663 units in stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and compliance requirements across different manufacturing and distribution channels.

Substiute Parts

3299Y-1-504

Bourns Inc.In Stock: 7063299Y-1-504 Datasheet

Current PartRFQ

3299Y-1-504LF

Bourns Inc.In Stock: 40293299Y-1-504LF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

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

• Resistance value: 500 kOhms
• Power rating: 0.5W (1/2W)
• Tolerance: ±10%
• Temperature coefficient: ±100ppm/°C
• Number of turns: 25
• Adjustment type: Top Adjustment
• Resistive material: Cermet
• Mounting type: Through Hole
• Termination style: PC Pins
• Physical dimensions: Rectangular - 0.375" x 0.240" Face (9.53mm x 6.10mm)
• Series: Trimpot® 3299 - Sealed

The substitute part 3299Y-1-504LF meets all electrical and mechanical specifications identical to the main part number. The primary distinction is RoHS compliance status and inventory availability.

Parameter Comparison

Engineering Selection Recommendations

Both the 3299Y-1-504 and 3299Y-1-504LF are functionally equivalent and interchangeable based on electrical and mechanical specifications. Selection between these parts should be based on the following criteria:

3299Y-1-504: Select this part number when RoHS non-compliant components are acceptable for the application or when legacy design requirements specify this exact part number.

3299Y-1-504LF: Select this part number for applications requiring ROHS3 compliance. This variant offers superior inventory availability with 3975 units in stock compared to 663 units for the non-compliant version, supporting higher-volume production requirements and extended lead-time mitigation.

Both parts carry REACH Affected status and EAR99 export classification. Physical footprint, electrical performance, and operational characteristics are identical across both variants.

Frequently Asked Questions (FAQ)

Q: Are the 3299Y-1-504 and 3299Y-1-504LF electrically interchangeable?

A: Yes. Both parts deliver identical electrical performance with 500 kOhms resistance, 0.5W power rating, ±10% tolerance, and ±100ppm/°C temperature coefficient. The "LF" suffix indicates RoHS3 compliance only; no functional differences exist.

Q: What does the "LF" designation mean?

A: The "LF" suffix denotes lead-free construction and ROHS3 compliance. The 3299Y-1-504LF meets RoHS3 regulatory requirements, while the 3299Y-1-504 does not.

Q: Can I use 3299Y-1-504LF as a direct replacement for 3299Y-1-504 in existing designs?

A: Yes. The parts are mechanically and electrically identical. The 3299Y-1-504LF can be substituted without design modifications, PCB layout changes, or performance impact.

Q: Are there any packaging differences between these part numbers?

A: No. Both parts are supplied in tube packaging with identical physical dimensions of 0.375" x 0.240" face (9.53mm x 6.10mm).

Q: Which part should I specify for new designs?

A: Specify 3299Y-1-504LF for new designs to ensure RoHS3 compliance and benefit from higher inventory availability. This part meets current regulatory standards and supports long-term supply chain stability.

Q: What is the difference between the Trimpot® 3299 series and other trimmer potentiometer series?

A: The Trimpot® 3299 series is a sealed design within the Bourns trimmer potentiometer portfolio. Substitution is limited to parts within this sealed series that match all specified electrical and mechanical parameters.