Bourns 3266P-1-503 Trimmer Potentiometer: Equivalent & Substitute Parts

Part Overview

The Bourns 3266P-1-503 is a 50 kOhms, 0.25W through-hole trimmer potentiometer with PC pin termination and side adjustment capability. This sealed Trimpot® 3266 series component is designed for precision resistance adjustment in electronic circuits requiring reliable, long-term performance. The part is currently active in production with 881 units in stock. Substitute parts are identified when equivalent electrical specifications, mechanical dimensions, and functional characteristics align with application requirements.

Substiute Parts

3266P-1-503

Bourns Inc.In Stock: 9353266P-1-503 Datasheet

Current PartRFQ

64XR50KLF

TT Electronics/BIIn Stock: 218064XR50KLF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The TT Electronics/BI 64XR50KLF is classified as a direct substitute for the Bourns 3266P-1-503 based on the following alignment of critical parameters:

• Resistance value: 50 kOhms (identical)
• Power rating: 0.25W, 1/4W (identical)
• Tolerance: ±10% (identical)
• Temperature coefficient: ±100ppm/°C (identical)
• Number of turns: 12 (identical)
• Adjustment type: Side Adjustment (identical)
• Resistive material: Cermet (identical)
• Mounting type: Through Hole (identical)
• Termination style: PC Pins (identical)

The 64XR50KLF maintains functional and electrical equivalence with a minor variation in face dimension (0.250" x 0.165" versus 0.250" x 0.174"), which remains within acceptable mechanical tolerance for standard PCB mounting applications.

Parameter Comparison

Engineering Selection Recommendations

Both the Bourns 3266P-1-503 and TT Electronics/BI 64XR50KLF are active production components with identical electrical and functional specifications. Selection between these parts should be based on regulatory and compliance requirements:

The TT Electronics/BI 64XR50KLF is RoHS Compliant and REACH Unaffected, making it suitable for applications subject to environmental regulations and restricted substance directives. The Bourns 3266P-1-503 is RoHS non-compliant and REACH Affected, requiring evaluation against specific application compliance mandates.

Both parts carry the same ECCN classification (EAR99) and are suitable for standard commercial electronics applications. The minor dimensional variation in the Y-axis (0.174" versus 0.165") does not affect functional performance or standard PCB mounting compatibility.

Frequently Asked Questions (FAQ)

Q: Can the TT Electronics/BI 64XR50KLF directly replace the Bourns 3266P-1-503 in existing designs?

A: Yes. All electrical parameters, resistance value, power rating, tolerance, temperature coefficient, number of turns, adjustment type, resistive material, mounting type, and termination style are identical. The face dimension difference of 0.009" in the Y-axis is within standard mechanical tolerance for through-hole PC pin mounting.

Q: What is the primary difference between these two parts?

A: The TT Electronics/BI 64XR50KLF is RoHS Compliant with MSL 1 rating, while the Bourns 3266P-1-503 is RoHS non-compliant. This distinction is critical for applications requiring environmental compliance certification.

Q: Are there any performance differences in temperature stability or resistance tolerance?

A: No. Both parts specify identical temperature coefficient (±100ppm/°C) and tolerance (±10%), ensuring equivalent performance across the operating temperature range.

Q: Does the face dimension difference affect PCB layout or mounting?

A: The 0.009" difference in the Y-axis dimension is negligible for standard PCB mounting applications. Both parts use identical PC pin termination and through-hole mounting, requiring no layout modifications.

Q: Which part should be selected for new designs?

A: Selection depends on compliance requirements. For applications requiring RoHS compliance, select the TT Electronics/BI 64XR50KLF. For applications without compliance mandates, either part is functionally equivalent.