Trimmer Resistors

What are trimmer potentiometers?

Trimmer potentiometers, sometimes referred to as trim pots or trimmer resistors are a type of adjustable potentiometer (variable resistor). They are used to calibrate and fine-tune circuits. Trimmer potentiometers are typically constructed from cermet or have a carbon composition. They can be mounted directly onto PCBs (printed circuit boards).

Trimmer potentiometers are not adjusted very frequently. You can think of them as a set and forget component. Trim pots let you set (or trim) the resistance to obtain a very precise current, output voltage or gain. Once the value has been set, it is unlikely that youll need to adjust the trimmer again unless you need to recalibrate the circuit.

Can I replace a normal potentiometer with a trimmer potentiometer?

Yes, you can. However, trimmer potentiometers are typically more expensive than standard potentiometers with a fixed resistance rating. It is also worth bearing in mind the difference in lifespan too. Many potentiometers have a lifespan that allows for hundreds of thousands of cycles. Trimmer potentiometers typically have a lifespan of a few hundred cycles (at best). Trim pots also tend to take up more space on a PCB than a standard potentiometer.

Do I need a single turn or multiturn trim pot?

This completely depends on the intended application of the trim pot. Multiturn trimmer pots tend to have a higher resolution than single turn models. A single turn trimmer potentiometer is ideal for applications where a resolution of one turn is enough.

Adjustment types

Trimmer potentiometers are normally adjusted by hand (you can turn the adjustment knob with your fingers), with a screwdriver or with a specialised adjustment tool designed for use with a particular model or series.


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Description Price Maximum Resistance Mounting Type Number of Turns Orientation Power Rating Series Termination Style Length Tolerance Depth Temperature Coefficient Height Dimensions Maximum Voltage Rating
RS Stock No. 144-2110
Mfr. Part No.67PR100KLF
£0.535
Each (In a Box of 50)
Units
100kΩ Through Hole 20 Side Adjust 0.5W 67 Solder Pin 9.53mm ±10% - ±100ppm/°C - - 200 V dc
RS Stock No. 144-2099
Mfr. Part No.64YR2KLF
£1.308
Each (In a Tube of 50)
Units
2kΩ Through Hole 12 Top Adjust 0.25 W @ 85 °C 64 Solder Pin 6.35mm ±10% - ±100ppm/°C - - 200 V dc
RS Stock No. 144-2111
Mfr. Part No.67PR20KLF
£0.476
Each (In a Box of 50)
Units
20kΩ Through Hole 20 Side Adjust 0.5W 67 Solder Pin 9.53mm ±10% - ±100ppm/°C - - 200 V dc
RS Stock No. 144-2064
Mfr. Part No.44WR2KLFT7
£1.198
Each (On a Reel of 250)
Units
2kΩ Surface Mount 9 Top Adjust 0.25 W @ 85 °C 44 Solder Pin 4.83mm ±10% - ±100ppm/°C - - 300 V dc
RS Stock No. 144-2240
Mfr. Part No.64WR5KLF
£1.50
Each (In a Pack of 5)
Units
5kΩ Through Hole 12 Top Adjust 0.25 W @ 85 °C 64 Solder Pin 6.35mm ±10% - ±100ppm/°C - - 200 V dc
RS Stock No. 144-2101
Mfr. Part No.64WR2KLF
£1.137
Each (In a Tube of 50)
Units
2kΩ Through Hole 12 Top Adjust 0.25 W @ 85 °C 64 Solder Pin 6.35mm ±10% - ±100ppm/°C - - 200 V dc
RS Stock No. 144-2113
Mfr. Part No.67XR100KLF
£0.867
Each (In a Box of 50)
Units
100kΩ Through Hole 20 Side Adjust 0.5W 67 Solder Pin 11.11mm ±10% - ±100ppm/°C - - 200 V dc
RS Stock No. 144-2065
Mfr. Part No.67XR20KLF
£0.867
Each (In a Box of 50)
Units
20kΩ Through Hole 20 Side Adjust 0.5W 67 Solder Pin 11.11mm ±10% - ±100ppm/°C - - 200 V dc
RS Stock No. 144-2216
Mfr. Part No.44WR20KLFT7
£2.92
Each
Units
20kΩ Surface Mount 9 Top Adjust 0.25 W @ 85 °C 44 Solder Pin 4.83mm ±10% - ±100ppm/°C - - 300 V dc
RS Stock No. 144-2241
Mfr. Part No.67YR10KLF
£1.136
Each (In a Pack of 5)
Units
10kΩ Through Hole 20 Top Adjust 0.5W 67 Solder Pin 9.53mm ±10% - ±100ppm/°C - - 200 V dc
RS Stock No. 144-2208
Mfr. Part No.64WR100LF
£1.50
Each (In a Pack of 5)
Units
100Ω Through Hole 12 Top Adjust 0.25 W @ 85 °C 64 Solder Pin 6.35mm ±10% - ±100ppm/°C - - 200 V dc
RS Stock No. 144-2193
Mfr. Part No.89PR5KLFTB
£1.112
Each (In a Pack of 5)
Units
5kΩ Through Hole 20 Side Adjust 0.75W 89 Solder Pin 19.05mm ±10% - ±100ppm/°C - - 200 V dc
RS Stock No. 144-2071
Mfr. Part No.67XR2KLF
£0.867
Each (In a Box of 50)
Units
2kΩ Through Hole 20 Side Adjust 0.5W 67 Solder Pin 11.11mm ±10% - ±100ppm/°C - - 200 V dc
RS Stock No. 144-2102
Mfr. Part No.44WR20KLFT7
£1.785
Each (On a Reel of 250)
Units
20kΩ Surface Mount 9 Top Adjust 0.25 W @ 85 °C 44 Solder Pin 4.83mm ±10% - ±100ppm/°C - - 300 V dc
RS Stock No. 144-2114
Mfr. Part No.67XR200KLF
£0.499
Each (In a Box of 50)
Units
200kΩ Through Hole 20 Side Adjust 0.5W 67 Solder Pin 11.11mm ±10% - ±100ppm/°C - - 200 V dc
RS Stock No. 144-2221
Mfr. Part No.67XR10KLF
£1.136
Each (In a Pack of 5)
Units
10kΩ Through Hole 20 Side Adjust 0.5W 67 Solder Pin 11.11mm ±10% - ±100ppm/°C - - 200 V dc
RS Stock No. 144-2202
Mfr. Part No.82PR5KLFTB
£0.78
Each (In a Pack of 5)
Units
5kΩ Through Hole 1 Top Adjust 0.5W 82 Solder Pin - ±10% - ±100ppm/°C - - 200 V dc
RS Stock No. 144-2183
Mfr. Part No.89PR500KLFTB
£1.112
Each (In a Pack of 5)
Units
500kΩ Through Hole 20 Side Adjust 0.75W 89 Solder Pin 19.05mm ±10% - ±100ppm/°C - - 200 V dc
RS Stock No. 144-2106
Mfr. Part No.64WR100KLF
£1.166
Each (In a Tube of 50)
Units
100kΩ Through Hole 12 Top Adjust 0.25 W @ 85 °C 64 Solder Pin 6.35mm ±10% - ±100ppm/°C - - 200 V dc
RS Stock No. 144-2067
Mfr. Part No.67YR10KLF
£0.882
Each (In a Box of 50)
Units
10kΩ Through Hole 20 Top Adjust 0.5W 67 Solder Pin 9.53mm ±10% - ±100ppm/°C - - 200 V dc