3386U-1-102LF Trimmer Potentiometer Equivalent & Substitute Parts

Part Overview

The Bourns 3386U-1-102LF is a 1 kOhm, 0.5W through-hole trimmer potentiometer with top adjustment, PC pin termination, and cermet resistive material. This component is classified as Active product status. Equivalent and substitute parts are identified based on matching electrical specifications, mechanical compatibility, and functional performance within the allowed parameter tolerances for this product category.

Key Parameters

Parameter	Value
Resistance	1 kOhms
Power Rating	0.5W (1/2W)
Tolerance	±10%
Temperature Coefficient	±100ppm/°C
Number of Turns	1
Resistive Material	Cermet
Mounting Type	Through Hole
Termination Style	PC Pins
Adjustment Type	Top Adjustment

Substitute Part Grouping Explanation

Substitute parts for the 3386U-1-102LF are grouped based on strict parameter matching. All substitutes maintain identical electrical specifications: 1 kOhm resistance, 0.5W power rating, ±10% tolerance, ±100ppm/°C temperature coefficient, 1 turn, cermet material, through-hole mounting, and PC pin termination.

Substitutes are differentiated by the following allowed variations:

Adjustment Type: Top adjustment (primary specification) or side adjustment (M63P102KB40 only)
Physical Dimensions: Square or round form factors with different face sizes
Packaging Format: Tube or bulk
Manufacturer: Bourns Inc., TT Electronics/BI, or Vishay Spectrol
RoHS Compliance Level: ROHS3 or RoHS Compliant

These variations do not affect electrical performance or functional compatibility in applications where the specified adjustment type and physical envelope are acceptable.

Parameter Comparison

Part Number	Manufacturer	Resistance	Power (W)	Tolerance	Temp Coeff	Turns	Material	Adjustment	Termination	Size / Dimension	Packaging	RoHS Status
3386U-1-102LF	Bourns Inc.	1 kOhms	0.5	±10%	±100ppm/°C	1	Cermet	Top	PC Pins	Square 0.375" x 0.375" (9.53mm x 9.53mm)	Tube	ROHS3
25PR1KLF	TT Electronics/BI	1 kOhms	0.5	±10%	±100ppm/°C	1	Cermet	Top	PC Pins	Square 0.270" x 0.270" (6.86mm x 6.86mm)	Tube	RoHS
72PR1KLF	TT Electronics/BI	1 kOhms	0.5	±10%	±100ppm/°C	1	Cermet	Top	PC Pins	Square 0.375" x 0.375" (9.53mm x 9.53mm)	Bulk	ROHS3
72PMR1KLF	TT Electronics/BI	1 kOhms	0.5	±10%	±100ppm/°C	1	Cermet	Top	PC Pins	Square 0.375" x 0.375" (9.53mm x 9.53mm)	Bulk	ROHS3
82PR1KLF	TT Electronics/BI	1 kOhms	0.5	±10%	±100ppm/°C	1	Cermet	Top	PC Pins	Round 0.250" Dia (6.35mm)	Bulk	ROHS3
M63P102KB40	Vishay Spectrol	1 kOhms	0.5	±10%	±100ppm/°C	1	Cermet	Side	PC Pins	Square 0.395" x 0.395" (10.03mm x 10.03mm)	Bulk	ROHS3

Engineering Selection Recommendations

All listed substitute parts maintain active product status and comply with ROHS3 or RoHS regulations. Selection among substitutes depends on application-specific requirements:

Direct Electrical Equivalents (Top Adjustment): The 72PR1KLF and 72PMR1KLF from TT Electronics/BI are electrically and mechanically identical to the 3386U-1-102LF, differing only in packaging format (bulk vs. tube). Both are ROHS3 compliant.

Compact Form Factor Alternative: The 25PR1KLF offers identical electrical performance with a smaller physical footprint (0.270" vs. 0.375" face dimension) and maintains top adjustment. This substitute is suitable for space-constrained applications.

Round Form Factor Alternative: The 82PR1KLF provides a round 0.250" diameter package while maintaining all electrical specifications and top adjustment capability.

Side Adjustment Alternative: The M63P102KB40 from Vishay Spectrol is electrically equivalent but features side adjustment instead of top adjustment. This part is suitable only for applications where side adjustment access is acceptable or preferred.

Frequently Asked Questions (FAQ)

Q: Can I substitute the 3386U-1-102LF with any of these parts without circuit redesign?

A: Yes, for the 72PR1KLF, 72PMR1KLF, 25PR1KLF, and 82PR1KLF. All maintain identical electrical specifications and top adjustment. The M63P102KB40 is electrically equivalent but requires side adjustment access instead of top adjustment, which may require mechanical redesign depending on your application.

Q: What is the difference between tube and bulk packaging?

A: Tube packaging (3386U-1-102LF, 25PR1KLF) provides individual component protection in reels. Bulk packaging (72PR1KLF, 72PMR1KLF, 82PR1KLF, M63P102KB40) is supplied in larger quantities without individual packaging. Electrical and functional performance is identical.

Q: Are all substitutes RoHS compliant?

A: Yes. The 3386U-1-102LF, 72PR1KLF, 72PMR1KLF, 82PR1KLF, and M63P102KB40 are ROHS3 compliant. The 25PR1KLF is RoHS compliant. Both compliance levels meet current regulatory requirements.

Q: Which substitute has the smallest physical size?

A: The 25PR1KLF has the smallest footprint with a 0.270" x 0.270" square face (6.86mm x 6.86mm), compared to the original 0.375" x 0.375" (9.53mm x 9.53mm).

Q: Can I use the M63P102KB40 as a direct replacement?

A: Electrically yes, but mechanically only if your design accommodates side adjustment instead of top adjustment. The M63P102KB40 features a slightly larger body (0.395" x 0.395") and requires adjustment access from the side rather than the top.

Q: Do all substitutes have the same temperature coefficient?

A: Yes. All listed substitutes maintain ±100ppm/°C temperature coefficient, identical to the 3386U-1-102LF.

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