25PR100LF Trimmer Potentiometer - Equivalent & Substitute Parts

Part Overview

The 25PR100LF is a 100 Ohm, 0.5W through-hole trimmer potentiometer manufactured by TT Electronics/BI. This cermet-based component features top adjustment with PC pin termination and is rated for ±10% tolerance with a temperature coefficient of ±100ppm/°C. The part is currently active and RoHS compliant. Substitute parts are necessary when the original manufacturer's stock is unavailable, when design requirements permit alternative form factors, or when specific compliance certifications are required for end applications.

Key Parameters

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

Substitute Part Grouping Explanation

Substitution eligibility for the 25PR100LF is determined by strict equivalence across the following parameters: 100 Ohm resistance value, 0.5W power rating, ±10% tolerance, ±100ppm/°C temperature coefficient, single-turn adjustment, top adjustment configuration, cermet resistive material, through-hole mounting, and PC pin termination. All substitute parts listed meet these electrical and mechanical requirements. Physical form factor variations (square, rectangular, or round housings) are permitted provided all other specifications remain identical. Compliance certifications (RoHS status, REACH status) may differ between the main part and substitutes but do not affect electrical or mechanical interchangeability.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Resistance	Power (Watts)	Tolerance	Temperature Coefficient	Turns	Adjustment Type	Material	Mounting	Termination	Size / Dimension	RoHS Status
25PR100LF	TT Electronics/BI	100 Ohms	0.5W	±10%	±100ppm/°C	1	Top Adjustment	Cermet	Through Hole	PC Pins	Square - 0.270" x 0.270" (6.86mm x 6.86mm)	RoHS Compliant
3329H-1-101LF	Bourns Inc.	100 Ohms	0.5W	±10%	±100ppm/°C	1	Top Adjustment	Cermet	Through Hole	PC Pins	Round - 0.250" Dia (6.35mm)	ROHS3 Compliant
3362F-1-101LF	Bourns Inc.	100 Ohms	0.5W	±10%	±100ppm/°C	1	Top Adjustment	Cermet	Through Hole	PC Pins	Rectangular - 0.275" x 0.260" (6.99mm x 6.60mm)	ROHS3 Compliant
3362H-1-101LF	Bourns Inc.	100 Ohms	0.5W	±10%	±100ppm/°C	1	Top Adjustment	Cermet	Through Hole	PC Pins	Rectangular - 0.275" x 0.260" (6.99mm x 6.60mm)	ROHS3 Compliant
3362P-1-101LF	Bourns Inc.	100 Ohms	0.5W	±10%	±100ppm/°C	1	Top Adjustment	Cermet	Through Hole	PC Pins	Rectangular - 0.275" x 0.260" (6.99mm x 6.60mm)	ROHS3 Compliant
3362R-1-101LF	Bourns Inc.	100 Ohms	0.5W	±10%	±100ppm/°C	1	Top Adjustment	Cermet	Through Hole	PC Pins	Rectangular - 0.275" x 0.260" (6.99mm x 6.60mm)	ROHS3 Compliant
3362U-1-101LF	Bourns Inc.	100 Ohms	0.5W	±10%	±100ppm/°C	1	Top Adjustment	Cermet	Through Hole	PC Pins	Rectangular - 0.275" x 0.260" (6.99mm x 6.60mm)	ROHS3 Compliant
3386F-1-101LF	Bourns Inc.	100 Ohms	0.5W	±10%	±100ppm/°C	1	Top Adjustment	Cermet	Through Hole	PC Pins	Square - 0.375" x 0.375" (9.53mm x 9.53mm)	ROHS3 Compliant
3386G-1-101LF	Bourns Inc.	100 Ohms	0.5W	±10%	±100ppm/°C	1	Top Adjustment	Cermet	Through Hole	PC Pins	Square - 0.375" x 0.375" (9.53mm x 9.53mm)	ROHS3 Compliant
3386P-1-101	Bourns Inc.	100 Ohms	0.5W	±10%	±100ppm/°C	1	Top Adjustment	Cermet	Through Hole	PC Pins	Square - 0.375" x 0.375" (9.53mm x 9.53mm)	RoHS non-compliant

Engineering Selection Recommendations

All listed substitute parts are electrically and mechanically equivalent to the 25PR100LF. Selection should be based on compliance requirements and physical space constraints within the application.

For applications requiring RoHS3 compliance, the Bourns Trimpot 3329H-1-101LF, 3362 series (3362F-1-101LF, 3362H-1-101LF, 3362P-1-101LF, 3362R-1-101LF, 3362U-1-101LF), and 3386 series (3386F-1-101LF, 3386G-1-101LF) are suitable. The 3386P-1-101 is RoHS non-compliant and should be used only in applications where RoHS compliance is not required.

For applications with space constraints, the 3329H-1-101LF offers the smallest footprint at 0.250" diameter. The 3362 series provides a rectangular form factor at 0.275" x 0.260", while the 3386 series offers a larger square form factor at 0.375" x 0.375". The original 25PR100LF maintains a square form factor at 0.270" x 0.270".

Frequently Asked Questions (FAQ)

Q: Can I substitute the 25PR100LF with any of the listed Bourns parts?

A: Yes. All listed substitute parts meet the electrical specifications (100 Ohm resistance, 0.5W power rating, ±10% tolerance, ±100ppm/°C temperature coefficient, single-turn top adjustment, cermet material, through-hole mounting, and PC pin termination). Physical form factor differences do not affect electrical interchangeability.

Q: What is the difference between the 3362 and 3386 series?

A: Both series are electrically identical for this 100 Ohm, 0.5W configuration. The primary difference is physical size. The 3362 series has a rectangular footprint of 0.275" x 0.260", while the 3386 series has a larger square footprint of 0.375" x 0.375". Selection depends on available PCB space.

Q: Does RoHS compliance affect electrical performance?

A: No. RoHS compliance is a material composition requirement and does not alter electrical or mechanical performance. The 3386P-1-101 is RoHS non-compliant but electrically identical to RoHS-compliant alternatives. Use only in applications where RoHS compliance is not mandated.

Q: Are the PC pin configurations identical across all parts?

A: Yes. All parts use PC pin termination suitable for through-hole PCB mounting. Pin spacing and configuration are standardized across the 100 Ohm, 0.5W trimmer potentiometer category.

Q: Which substitute offers the best inventory availability?

A: The 3362P-1-101LF has the highest inventory level at 65,700 pieces. Other parts range from 973 to 3,000 pieces in stock.

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