Bourns 3319P-1-101 Trimmer Potentiometer Equivalent & Substitute Parts

Part Overview

The Bourns 3319P-1-101 is a 100 Ohm, 0.2W through-hole trimmer potentiometer with top adjustment, featuring PC pin termination and carbon resistive material. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The 3319P series represents an open-frame design suitable for applications requiring compact, adjustable resistance in PC board assemblies.

Substiute Parts

3319P-1-101

Bourns Inc.In Stock: 10263319P-1-101 Datasheet

Current PartRFQ

37PR100LF

TT Electronics/BIIn Stock: 104837PR100LF Datasheet

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Key Parameters

Substitute Part Grouping Explanation

The TT Electronics/BI 37PR100LF qualifies as a functional substitute for the Bourns 3319P-1-101 based on the following critical parameters:

Matching Parameters:

• Resistance value: 100 Ohms (identical)
• Adjustment type: Top Adjustment (identical)
• Mounting type: Through Hole (identical)
• Termination style: PC Pins (identical)
• Number of turns: 1 (identical)

Allowable Variations:

• Power rating: 0.5W (1/2W) versus 0.2W (1/5W) — higher power rating provides enhanced thermal margin
• Tolerance: ±20% versus ±25% — tighter tolerance improves accuracy
• Temperature coefficient: ±250ppm/°C versus ±1000ppm/°C — superior temperature stability
• Resistive material: Cermet versus Carbon — different material composition with improved performance characteristics
• Physical dimensions: 0.453" x 0.346" (11.50mm x 8.80mm) versus 0.433" x 0.354" (11.00mm x 9.00mm) — minor dimensional variation within typical PCB layout tolerance

The 37PR100LF maintains active product status and full RoHS compliance, making it suitable for direct substitution in applications where the original component is no longer available.

Parameter Comparison

Engineering Selection Recommendations

The TT Electronics/BI 37PR100LF is the direct functional equivalent for the obsolete Bourns 3319P-1-101. Selection of this substitute is justified by:

• Product Status: The 37PR100LF maintains active manufacturing status, ensuring long-term availability and supply chain continuity.
• Compliance: Both components meet RoHS requirements. The 37PR100LF carries full RoHS compliance, while the original part is ROHS3 compliant.
• Electrical Compatibility: Identical resistance, adjustment type, and termination configuration enable direct substitution without circuit redesign.
• Performance Enhancement: The 37PR100LF provides superior specifications including higher power rating (0.5W vs. 0.2W), tighter tolerance (±20% vs. ±25%), and improved temperature stability (±250ppm/°C vs. ±1000ppm/°C).
• Physical Compatibility: Minor dimensional variations fall within standard PCB layout tolerances for through-hole components.

Frequently Asked Questions (FAQ)

Q: Can the 37PR100LF be used as a direct replacement for the 3319P-1-101 without PCB modifications?

A: Yes. Both components share identical resistance, adjustment type, termination style, and number of turns. The minor dimensional difference (0.02" width, 0.008" height) is within typical through-hole component tolerance and does not require PCB layout changes.

Q: What is the significance of the higher power rating on the 37PR100LF?

A: The 37PR100LF is rated for 0.5W compared to the original 0.2W. This provides additional thermal margin and allows operation in applications with higher power dissipation requirements without exceeding component limits.

Q: How do the tolerance specifications differ, and does this affect circuit performance?

A: The 37PR100LF offers ±20% tolerance versus ±25% on the original part. Tighter tolerance improves initial accuracy of the trimmer adjustment. For applications requiring precise resistance values, the 37PR100LF provides better performance.

Q: What is the difference between carbon and cermet resistive materials?

A: The original 3319P-1-101 uses carbon material, while the 37PR100LF uses cermet. Cermet provides superior temperature stability (±250ppm/°C vs. ±1000ppm/°C) and better long-term reliability in temperature-varying environments.

Q: Are there any compliance or certification differences between these parts?

A: Both components are RoHS compliant and REACH unaffected. The 3319P-1-101 is ROHS3 compliant, and the 37PR100LF is RoHS compliant. Both carry EAR99 ECCN classification.

Q: What packaging is available for the 37PR100LF?

A: The 37PR100LF is supplied in bulk packaging, suitable for production assembly and component procurement workflows.