Bourns 3386G-1-102 Trimmer Potentiometer: Equivalent & Substitute Parts

Part Overview

The Bourns 3386G-1-102 is a 1 kOhm, 0.5W through-hole trimmer potentiometer with PC pin termination and top adjustment. This sealed Trimpot® 3386 series component is actively produced and suitable for precision circuit tuning applications requiring cermet resistive elements. Substitute parts become necessary when addressing supply constraints, packaging preferences, compliance requirements, or form factor specifications for equivalent electrical performance.

Substiute Parts

3386G-1-102

Bourns Inc.In Stock: 9053386G-1-102 Datasheet

Current PartRFQ

25PR1KLF

TT Electronics/BIIn Stock: 1231025PR1KLF Datasheet

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72PMR1KLF

TT Electronics/BIIn Stock: 204472PMR1KLF Datasheet

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72PR1KLF

TT Electronics/BIIn Stock: 200572PR1KLF Datasheet

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82PR1KLF

TT Electronics/BIIn Stock: 290082PR1KLF Datasheet

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M63P102KB40

Vishay SpectrolIn Stock: 1152M63P102KB40 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 3386G-1-102 is determined by strict electrical and mechanical parameter matching:

Primary Substitution Criteria:

• Resistance value: 1 kOhms (exact match required)
• Power rating: 0.5W minimum
• Tolerance: ±10% or better
• Temperature coefficient: ±100ppm/°C or better
• Number of turns: 1 turn
• Resistive material: Cermet
• Mounting type: Through Hole
• Termination style: PC Pins

Secondary Considerations:

• Adjustment type (top vs. side) affects mechanical integration
• Physical dimensions affect PCB layout compatibility
• Packaging format (tube vs. bulk) affects procurement and handling
• RoHS and REACH compliance status for regulatory requirements

All listed substitute parts meet the primary electrical criteria. Differences in adjustment type, form factor, and compliance status are noted for engineering selection.

Parameter Comparison

Engineering Selection Recommendations

Direct Electrical Equivalents (Top Adjustment):

The 72PR1KLF and 72PMR1KLF from TT Electronics are direct functional equivalents to the 3386G-1-102. Both maintain identical electrical specifications, matching face dimensions (9.53mm x 9.53mm square), and top adjustment configuration. The 72PMR1KLF offers ROHS3 compliance and bulk packaging, while 72PR1KLF provides the same compliance in bulk format. Both are suitable for direct PCB layout substitution without mechanical redesign.

Compact Form Factor Alternative:

The 25PR1KLF provides electrical equivalence with a smaller footprint (6.86mm x 6.86mm square). This option is appropriate when PCB space constraints exist and the reduced size is compatible with circuit layout requirements. RoHS compliance is available with this option.

Dimensional Variant:

The 82PR1KLF maintains electrical specifications but uses a round form factor (6.35mm diameter) instead of square. This geometry change requires PCB layout verification for hole pattern compatibility.

Adjustment Type Variant:

The M63P102KB40 from Vishay Spectrol provides electrical equivalence with side adjustment instead of top adjustment. This configuration change affects operator access and tuning methodology. The larger face dimension (10.03mm x 10.03mm) must be verified against PCB layout constraints. ROHS3 compliance is available.

Compliance Considerations:

For applications requiring RoHS3 compliance, the 72PR1KLF, 72PMR1KLF, 82PR1KLF, and M63P102KB40 are suitable. The 25PR1KLF provides RoHS compliance (non-ROHS3). The original 3386G-1-102 is RoHS non-compliant and REACH affected, making substitution necessary for regulated applications.

Frequently Asked Questions (FAQ)

Q: Can the 25PR1KLF be used as a direct replacement for the 3386G-1-102?

A: The 25PR1KLF is electrically equivalent but has a smaller square footprint (6.86mm vs. 9.53mm). PCB layout compatibility must be verified. The part is suitable if the reduced dimensions do not conflict with circuit board design.

Q: What is the difference between top and side adjustment?

A: Top adjustment (3386G-1-102, 25PR1KLF, 72PR1KLF, 72PMR1KLF, 82PR1KLF) allows tuning from above the PCB. Side adjustment (M63P102KB40) requires access from the component side. Mechanical integration and operator access differ between these configurations.

Q: Are all substitute parts RoHS compliant?

A: The 25PR1KLF is RoHS compliant. The 72PR1KLF, 72PMR1KLF, 82PR1KLF, and M63P102KB40 are ROHS3 compliant. The original 3386G-1-102 is RoHS non-compliant.

Q: Does the round form factor of the 82PR1KLF affect electrical performance?

A: No. The 82PR1KLF maintains identical electrical specifications. The round geometry (6.35mm diameter) is a mechanical difference only. PCB hole pattern compatibility must be confirmed.

Q: What packaging formats are available?

A: The 3386G-1-102 and 25PR1KLF are supplied in tube packaging. The 72PR1KLF, 72PMR1KLF, 82PR1KLF, and M63P102KB40 are supplied in bulk packaging. Procurement and handling procedures differ accordingly.

Q: Can the M63P102KB40 be used if the design requires top adjustment?

A: No. The M63P102KB40 features side adjustment, which is mechanically incompatible with designs requiring top adjustment access. The adjustment type cannot be changed without component replacement.

Q: Which substitute offers the best inventory availability?

A: The 25PR1KLF has the highest inventory level at 12,299 pieces. The 72PMR1KLF (2,034 pcs), 82PR1KLF (2,806 pcs), and 72PR1KLF (1,900 pcs) offer moderate availability. The M63P102KB40 (1,070 pcs) has the lowest inventory among substitutes.