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. 473-473
Mfr. Part No.CB10LV103M
R 6.088
Each (In a Pack of 5)
units
10 kΩ Through Hole 1 Top Adjust 3/20W CB10LV Pin 11mm ±20% - ±500ppm/°C - - -
RS stock no. 473-590
Mfr. Part No.CB10LV104M
R 6.202
Each (In a Pack of 5)
units
100 kΩ Through Hole 1 Top Adjust 3/20W CB10LV Pin 11mm ±20% - - - - -
RS stock no. 652-4322
Mfr. Part No.416PA501M
R 5.136
Each (In a Pack of 10)
units
500 Ω Through Hole 1 Top Adjust 0.2W 416 Pin 6.8mm ±20% - ±250ppm/°C - - -
RS stock no. 186-154
Mfr. Part No.PC910 1K RS
R 117.11
Each
units
1 kΩ Through Hole 1 Top Adjust 1W PC910 Pin - ±20% - - - - -
RS stock no. 652-4912
Mfr. Part No.416MA104P
R 3.746
Each (In a Pack of 10)
units
100 kΩ Through Hole 1 Top Adjust 0.2W 416 Pin 6.8mm ±25% - ±250ppm/°C - - -
RS stock no. 161-5566
Mfr. Part No.PC910 1K RS
R 107.85
Each (In a Box of 100)
units
1 kΩ Through Hole 1 Top Adjust 1W PC910 Pin - ±20% - - - - -
RS stock no. 168-0952
Mfr. Part No.416MA104P
R 3,646.36
1 Reel of 1000
Reel(s)
100 kΩ Through Hole 1 Top Adjust 0.2W 416 Pin 6.8mm ±25% - ±250ppm/°C - - -
RS stock no. 652-4170
Mfr. Part No.416MA103P
R 11.357
Each (In a Pack of 10)
units
10 kΩ Through Hole 1 Top Adjust 0.2W 416 Pin 6.8mm ±25% - ±250ppm/°C - - -
RS stock no. 652-4259
Mfr. Part No.416PA101M
R 8.875
Each (In a Pack of 10)
units
100 Ω Through Hole 1 Top Adjust 0.2W 416 Pin 6.8mm ±20% - ±250ppm/°C - - -
RS stock no. 168-0369
Mfr. Part No.416PA101M
R 5,191.92
1 Reel of 1000
Reel(s)
100 Ω Through Hole 1 Top Adjust 0.2W 416 Pin 6.8mm ±20% - ±250ppm/°C - - -
RS stock no. 652-4164
Mfr. Part No.416MA102P
R 13.025
Each (In a Pack of 10)
units
1 kΩ Through Hole 1 Top Adjust 0.2W 416 Pin 6.8mm ±25% - ±250ppm/°C - - -
RS stock no. 163-9529
Mfr. Part No.416MA103P
R 10.054
Each (In a Box of 500)
units
10 kΩ Through Hole 1 Top Adjust 0.2W 416 Pin 6.8mm ±25% - ±250ppm/°C - - -
RS stock no. 161-9911
Mfr. Part No.416MA102P
R 8.382
Each (In a Bag of 500)
units
1 kΩ Through Hole 1 Top Adjust 0.2W 416 Pin 6.8mm ±25% - ±250ppm/°C - - -
RS stock no. 652-4726
Mfr. Part No.409VA104M
R 19.08
Each
units
100 kΩ Through Hole 1 Side Adjust 0.5W 409 Pin 9mm ±20% - ±250ppm/°C - - -
RS stock no. 753-6821
Mfr. Part No.3142W204P
R 13.49
Each
units
200 kΩ Surface Mount 1 Top Adjust 0.15W 3142W Tab 4mm ±25% - ±250ppm/°C - - -
RS stock no. 754-2116
Mfr. Part No.3203X202P
R 36.13
Each
units
2 kΩ Surface Mount 1 Top Adjust 0.05W 3203 Tab 3.4mm ±20% - ±100ppm/°C - - -
RS stock no. 753-6818
Mfr. Part No.3142W202P
R 19.33
Each
units
2 kΩ Surface Mount 1 Top Adjust 0.15W 3142 Tab 4mm ±25% - ±250ppm/°C - - -
RS stock no. 753-6812
Mfr. Part No.3142W203P
R 22.49
Each
units
20 kΩ Surface Mount 1 Top Adjust 0.15W 3142 Tab 4mm ±25% - ±250ppm/°C - - -
RS stock no. 164-3582
Mfr. Part No.3142W203P
R 15.543
Each (On a Reel of 800)
units
20 kΩ Surface Mount 1 Top Adjust 0.15W 3142 Tab 4mm ±25% - ±250ppm/°C - - -
RS stock no. 173-5285
Mfr. Part No.CB10LH221M
R 2.886
Each (In a Box of 4000)
units
220 Ω Through Hole 1 Side Adjust 0.15W CB10 Pin 9.8mm ±20% - ±500ppm/°C - - -