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 you’ll 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. 652-4726
Mfr. Part No.409VA104M
PHP37.04
Each
units
100kΩ Through Hole 1 Side Adjust 0.5W 409 Pin 9mm ±20% - ±250ppm/°C - - -
RS Stock No. 168-0258
Mfr. Part No.409VA104M
PHP30,500.00
1 Reel of 1000
Reel(s)
100kΩ Through Hole 1 Side Adjust 0.5W 409 Pin 9mm ±20% - ±250ppm/°C - - -
RS Stock No. 652-4287
Mfr. Part No.416PA102M
PHP30.50
Each (In a Pack of 10)
units
1kΩ Through Hole 1 Top Adjust 0.2W 416 Pin 6.8mm ±20% - ±250ppm/°C - - -
RS Stock No. 161-5461
Mfr. Part No.416PA102M
PHP25.31
Each (In a Bag of 500)
units
1kΩ Through Hole 1 Top Adjust 0.2W 416 Pin 6.8mm ±20% - ±250ppm/°C - - -
RS Stock No. 168-0398
Mfr. Part No.409VA503M
PHP30,140.00
1 Reel of 1000
Reel(s)
50kΩ Through Hole 1 Side Adjust 0.5W 409 Pin 9mm ±20% - ±250ppm/°C - - -
RS Stock No. 652-4811
Mfr. Part No.409VA503M
PHP34.13
Each (In a Pack of 5)
units
50kΩ Through Hole 1 Side Adjust 0.5W 409 Pin 9mm ±20% - ±250ppm/°C - - -
RS Stock No. 652-4300
Mfr. Part No.416PA201M
PHP32.39
Each (In a Pack of 10)
units
200Ω Through Hole 1 Top Adjust 0.2W 416 Pin 6.8mm ±20% - ±250ppm/°C - - -
RS Stock No. 173-5322
Mfr. Part No.416PA201M
PHP18.872
Each (In a Box of 1000)
units
200Ω Through Hole 1 Top Adjust 0.2W 416 Pin 6.8mm ±20% - ±250ppm/°C - - -
RS Stock No. 652-4259
Mfr. Part No.416PA101M
PHP31.62
Each (In a Pack of 10)
units
100Ω Through Hole 1 Top Adjust 0.2W 416 Pin 6.8mm ±20% - ±250ppm/°C - - -
RS Stock No. 473-483
Mfr. Part No.CB10LV222M
PHP11.344
Each (In a Pack of 5)
units
2.2kΩ Through Hole 1 Top Adjust 0.15W CB10 Pin 11mm ±20% - ±500ppm/°C - - -
RS Stock No. 186-198
Mfr. Part No.PC910 22K RS
PHP598.93
Each
units
22kΩ Through Hole 1 Top Adjust 1W PC910 Pin - ±20% - - - - -
RS Stock No. 161-5539
Mfr. Part No.409VA102M
PHP25.57
Each (In a Box of 500)
units
1kΩ Through Hole 1 Side Adjust 0.5W 409 Pin 9mm ±20% - ±250ppm/°C - - -
RS Stock No. 652-4805
Mfr. Part No.3213X103M
PHP91.88
Each (In a Pack of 5)
units
10kΩ Surface Mount 1 Top Adjust 0.125W 3213 J-Hook 3.4mm ±20% - ±100ppm/°C - - -
RS Stock No. 652-4669
Mfr. Part No.409VA102M
PHP32.03
Each
units
1kΩ Through Hole 1 Side Adjust 0.5W 409 Pin 9mm ±20% - ±250ppm/°C - - -
RS Stock No. 168-0369
Mfr. Part No.416PA101M
PHP20,480.00
1 Reel of 1000
Reel(s)
100Ω Through Hole 1 Top Adjust 0.2W 416 Pin 6.8mm ±20% - ±250ppm/°C - - -
RS Stock No. 162-1720
Mfr. Part No.416MA503P
PHP25.535
Each (In a Box of 500)
units
50kΩ Through Hole 1 Top Adjust 0.2W 416 Pin 6.8mm ±25% - ±250ppm/°C - - -
RS Stock No. 652-4934
Mfr. Part No.416MA503P
PHP37.859
Each (In a Pack of 10)
units
50kΩ Through Hole 1 Top Adjust 0.2W 416 Pin 6.8mm ±25% - ±250ppm/°C - - -
RS Stock No. 161-4844
Mfr. Part No.CB10LH473M
PHP7.686
Each (In a Box of 500)
units
47kΩ Through Hole 1 Side Adjust 0.15W CB10 Pin 9.8mm ±20% - ±500ppm/°C - - -
RS Stock No. 163-9452
Mfr. Part No.3213X103M
PHP69.83
Each (On a Reel of 500)
units
10kΩ Surface Mount 1 Top Adjust 0.125W 3213 J-Hook 3.4mm ±20% - ±100ppm/°C - - -
RS Stock No. 473-518
Mfr. Part No.CB10LH473M
PHP10.478
Each (In a Pack of 5)
units
47kΩ Through Hole 1 Side Adjust 0.15W CB10 Pin 9.8mm ±20% - ±500ppm/°C - - -