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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Beskrivning Pris Maximum Resistance Mounting Type Number of Turns Orientation Power Rating Series Termination Style Length Tolerance Depth Temperature Coefficient Height Dimensions Maximum Voltage Rating
RS-artikelnummer 473-518
Tillv. art.nrCB10LH473M
VarumärkeTE Connectivity
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47 kΩ Through Hole 1 Side Adjust 0.15W CB10 Pin 9.8mm ±20% - ±500ppm/°C - - -
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Tillv. art.nr416XA204P
VarumärkeTE Connectivity
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200 kΩ Through Hole 1 Side Adjust 0.2W 416 Pin 6.8mm ±25% - ±250ppm/°C - - -
RS-artikelnummer 652-4322
Tillv. art.nr416PA501M
VarumärkeTE Connectivity
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500 Ω Through Hole 1 Top Adjust 0.2W 416 Pin 6.8mm ±20% - ±250ppm/°C - - -
RS-artikelnummer 652-4669
Tillv. art.nr409VA102M
VarumärkeTE Connectivity
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1 kΩ Through Hole 1 Side Adjust 0.5W 409 Pin 9mm ±20% - ±250ppm/°C - - -
RS-artikelnummer 168-0385
Tillv. art.nr3204X502P
VarumärkeTE Connectivity
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5 kΩ Surface Mount 1 Top Adjust 0.1W 3204 J-Hook 5mm ±25% - ±250ppm/°C - - -
RS-artikelnummer 135-4435
Tillv. art.nrPC910 10K RS
VarumärkeTE Connectivity
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10 kΩ Through Hole 1 Top Adjust 1W PC910 Pin - ±20% - - - - -
RS-artikelnummer 161-5716
Tillv. art.nr3204X105P
VarumärkeTE Connectivity
6,096 kr
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1 MΩ Surface Mount 1 Top Adjust 0.1W 3204 J-Hook 5mm ±25% - ±250ppm/°C - - -
RS-artikelnummer 754-2122
Tillv. art.nr3203X203P
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22,95 kr
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20 kΩ Surface Mount 1 Top Adjust 0.05W 3203 Tab 3.4mm ±20% - ±100ppm/°C - - -
RS-artikelnummer 652-4388
Tillv. art.nr416XA101P
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100 Ω Through Hole 1 Side Adjust 0.2W 416 Pin 6.8mm ±25% - ±250ppm/°C - - -
RS-artikelnummer 186-182
Tillv. art.nrPC910 10K RS
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10 kΩ Through Hole 1 Top Adjust 1W PC910 Pin - ±20% - - - - -
RS-artikelnummer 172-8271
Tillv. art.nr3152W102P
VarumärkeTE Connectivity
6,355 kr
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- Surface Mount 1 Top Adjust 0.2W 3152 Tab 3.8mm ±25% - ±250ppm/°C - - -
RS-artikelnummer 652-4631
Tillv. art.nr409VA105M
VarumärkeTE Connectivity
6,72 kr
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1 MΩ Through Hole 1 Side Adjust 0.5W 409 Pin 9mm ±20% - ±250ppm/°C - - -
RS-artikelnummer 186-233
Tillv. art.nrPC910 470K RS
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470 kΩ Through Hole 1 Top Adjust 1W PC910 Pin - ±20% - - - - -
RS-artikelnummer 172-8307
Tillv. art.nrPC910 220R RS
VarumärkeTE Connectivity
88,033 kr
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- Through Hole 1 Top Adjust 1W PC910 Pin - ±20% - - - - -
RS-artikelnummer 652-4675
Tillv. art.nr409VA202M
VarumärkeTE Connectivity
3,752 kr
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2 kΩ Through Hole 1 Side Adjust 0.5W 409 Pin 9mm ±20% - ±250ppm/°C - - -
RS-artikelnummer 161-5586
Tillv. art.nr416XA203P
VarumärkeTE Connectivity
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20 kΩ Through Hole 1 Side Adjust 0.2W 416 Pin 6.8mm ±25% - ±250ppm/°C - - -
RS-artikelnummer 163-9532
Tillv. art.nr416PA502M
VarumärkeTE Connectivity
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5 kΩ Through Hole 1 Top Adjust 0.2W 416 Pin 6.8mm ±20% - ±250ppm/°C - - -
RS-artikelnummer 652-4366
Tillv. art.nr416PA202M
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2 kΩ Through Hole 1 Top Adjust 0.2W 416 Pin 6.8mm ±20% - ±250ppm/°C - - -
RS-artikelnummer 168-0398
Tillv. art.nr409VA503M
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50 kΩ Through Hole 1 Side Adjust 0.5W 409 Pin 9mm ±20% - ±250ppm/°C - - -
RS-artikelnummer 161-5461
Tillv. art.nr416PA102M
VarumärkeTE Connectivity
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1 kΩ Through Hole 1 Top Adjust 0.2W 416 Pin 6.8mm ±20% - ±250ppm/°C - - -