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. 163-9452
Mfr. Part No.3213X103M
kr 11,85
Each (On a Reel of 500)
Units
10 kΩ Surface Mount 1 Top Adjust 0.125W 3213 J-Hook 3.4mm ±20% - ±100ppm/°C - - -
RS Stock No. 652-4805
Mfr. Part No.3213X103M
kr 15,652
Each (In a Pack of 5)
Units
10 kΩ Surface Mount 1 Top Adjust 0.125W 3213 J-Hook 3.4mm ±20% - ±100ppm/°C - - -
RS Stock No. 473-518
Mfr. Part No.CB10LH473M
kr 1,874
Each (In a Pack of 5)
Units
47 kΩ Through Hole 1 Side Adjust 0.15W CB10 Pin 9.8mm ±20% - ±500ppm/°C - - -
RS Stock No. 473-534
Mfr. Part No.CB10LV471M
kr 4,028
Each (In a Pack of 5)
Units
470 Ω Through Hole 1 Top Adjust 0.15W CB10 Pin 11mm ±20% - ±500ppm/°C - - -
RS Stock No. 652-4669
Mfr. Part No.409VA102M
kr 5,48
Each
Units
1 kΩ Through Hole 1 Side Adjust 0.5W 409 Pin 9mm ±20% - ±250ppm/°C - - -
RS Stock No. 172-8308
Mfr. Part No.PC910 470R RS
kr 41,575
Each (In a Box of 300)
Units
- Through Hole 1 Top Adjust 1W PC910 Pin - ±20% - - - - -
RS Stock No. 652-4631
Mfr. Part No.409VA105M
kr 6,58
Each
Units
1 MΩ Through Hole 1 Side Adjust 0.5W 409 Pin 9mm ±20% - ±250ppm/°C - - -
RS Stock No. 186-182
Mfr. Part No.PC910 10K RS
kr 79,76
Each
Units
10 kΩ Through Hole 1 Top Adjust 1W PC910 Pin - ±20% - - - - -
RS Stock No. 164-3596
Mfr. Part No.3203X102P
kr 11,107
Each (On a Reel of 500)
Units
1 kΩ Surface Mount 1 Top Adjust 0.05W 3203 Tab 3.4mm ±20% - ±100ppm/°C - - -
RS Stock No. 652-4445
Mfr. Part No.416XA503P
kr 2,124
Each (In a Pack of 10)
Units
50 kΩ Through Hole 1 Side Adjust 0.2W 416 Pin 6.8mm ±25% - ±250ppm/°C - - -
RS Stock No. 652-4849
Mfr. Part No.3213X105M
kr 6,624
Each (In a Pack of 5)
Units
1 MΩ Surface Mount 1 Top Adjust 0.125W 3213 J-Hook 3.4mm ±20% - ±100ppm/°C - - -
RS Stock No. 168-0233
Mfr. Part No.409VA501M
kr 3,481
Each (In a Box of 100)
Units
500 Ω Through Hole 1 Side Adjust 0.5W 409 Pin 9mm ±20% - ±250ppm/°C - - -
RS Stock No. 161-5539
Mfr. Part No.409VA102M
kr 4,104
Each (In a Box of 500)
Units
1 kΩ Through Hole 1 Side Adjust 0.5W 409 Pin 9mm ±20% - ±250ppm/°C - - -
RS Stock No. 652-4372
Mfr. Part No.416PA502M
kr 5,135
Each (In a Pack of 10)
Units
5 kΩ Through Hole 1 Top Adjust 0.2W 416 Pin 6.8mm ±20% - ±250ppm/°C - - -
RS Stock No. 164-3597
Mfr. Part No.3203X103P
kr 9,634
Each (In a Bag of 500)
Units
10 kΩ Surface Mount 1 Top Adjust 0.05W 3203 Tab 3.4mm ±20% - ±100ppm/°C - - -
RS Stock No. 173-5287
Mfr. Part No.CB10V 10M
kr 1,974
Each (In a Box of 4000)
Units
10 MΩ Through Hole 1 Top Adjust 0.15W CB10 Pin 9.8mm ±30% - ±500ppm/°C - - -
RS Stock No. 753-6802
Mfr. Part No.3142W104P
kr 13,16
Each
Units
100 kΩ Surface Mount 1 Top Adjust 0.15W 3142 Tab 4mm ±25% - ±250ppm/°C - - -
RS Stock No. 652-4726
Mfr. Part No.409VA104M
kr 6,38
Each
Units
100 kΩ Through Hole 1 Side Adjust 0.5W 409 Pin 9mm ±20% - ±250ppm/°C - - -
RS Stock No. 168-0385
Mfr. Part No.3204X502P
kr 7,408
Each (On a Reel of 1000)
Units
5 kΩ Surface Mount 1 Top Adjust 0.1W 3204 J-Hook 5mm ±25% - ±250ppm/°C - - -
RS Stock No. 161-5566
Mfr. Part No.PC910 1K RS
kr 64,412
Each (In a Box of 100)
Units
1 kΩ Through Hole 1 Top Adjust 1W PC910 Pin - ±20% - - - - -