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. 168-0373
Mfr. Part No.416XA102P
SGD0.749
Each (On a Reel of 1000)
units
1 kΩ Through Hole 1 Side Adjust 0.2W 416 Pin 6.8mm ±25% - ±250ppm/°C - - -
RS Stock No. 652-4350
Mfr. Part No.416XA102P
SGD0.855
Each (In a Pack of 10)
units
1 kΩ Through Hole 1 Side Adjust 0.2W 416 Pin 6.8mm ±25% - ±250ppm/°C - - -
RS Stock No. 754-2122
Mfr. Part No.3203X203P
SGD4.39
Each
units
20 kΩ Surface Mount 1 Top Adjust 0.05W 3203 Tab 3.4mm ±20% - ±100ppm/°C - - -
RS Stock No. 652-4748
Mfr. Part No.3213X502M
SGD2.222
Each (In a Pack of 5)
units
5 kΩ Surface Mount 1 Top Adjust 0.125W 3213 J-Hook 3.4mm ±20% - ±100ppm/°C - - -
RS Stock No. 186-182
Mfr. Part No.PC910 10K RS
SGD14.11
Each
units
10 kΩ Through Hole 1 Top Adjust 1W PC910 Pin - ±20% - - - - -
RS Stock No. 135-4435
Mfr. Part No.PC910 10K RS
SGD9.823
Each (In a Box of 100)
units
10 kΩ Through Hole 1 Top Adjust 1W PC910 Pin - ±20% - - - - -
RS Stock No. 135-8479
Mfr. Part No.3203X203P
SGD2.06
Each (On a Reel of 500)
units
20 kΩ Surface Mount 1 Top Adjust 0.05W 3203 Tab 3.4mm ±20% - ±100ppm/°C - - -
RS Stock No. 652-4170
Mfr. Part No.416MA103P
SGD1.255
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. 163-9529
Mfr. Part No.416MA103P
SGD0.665
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. 652-4805
Mfr. Part No.3213X103M
SGD3.928
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. 652-4675
Mfr. Part No.409VA202M
SGD1.618
Each (In a Pack of 5)
units
2 kΩ Through Hole 1 Side Adjust 0.5W 409 Pin 9mm ±20% - ±250ppm/°C - - -
RS Stock No. 172-8265
Mfr. Part No.3142W201P
SGD1.109
Each (On a Reel of 800)
units
- Surface Mount 1 Top Adjust 0.15W 3142W Tab 4mm ±25% - ±250ppm/°C - - -
RS Stock No. 168-0204
Mfr. Part No.416MA101P
SGD0.633
Each (In a Box of 1000)
units
100 Ω Through Hole 1 Top Adjust 0.2W 416 Pin 6.8mm ±25% - ±250ppm/°C - - -
RS Stock No. 172-8312
Mfr. Part No.PC910 470K RS
SGD12.765
Each (In a Box of 300)
units
- Through Hole 1 Top Adjust 1W PC910 Pin - ±20% - - - - -
RS Stock No. 652-4669
Mfr. Part No.409VA102M
SGD2.39
Each
units
1 kΩ Through Hole 1 Side Adjust 0.5W 409 Pin 9mm ±20% - ±250ppm/°C - - -
RS Stock No. 168-0369
Mfr. Part No.416PA101M
SGD0.63
Each (On a Reel of 1000)
units
100 Ω Through Hole 1 Top Adjust 0.2W 416 Pin 6.8mm ±20% - ±250ppm/°C - - -
RS Stock No. 186-148
Mfr. Part No.PC910 470R RS
SGD18.86
Each
units
470 Ω Through Hole 1 Top Adjust 1W PC910 Pin - ±20% - - - - -
RS Stock No. 652-4906
Mfr. Part No.416MA101P
SGD0.977
Each (In a Pack of 10)
units
100 Ω Through Hole 1 Top Adjust 0.2W 416 Pin 6.8mm ±25% - ±250ppm/°C - - -
RS Stock No. 753-6802
Mfr. Part No.3142W104P
SGD2.39
Each
units
100 kΩ Surface Mount 1 Top Adjust 0.15W 3142 Tab 4mm ±25% - ±250ppm/°C - - -
RS Stock No. 164-3582
Mfr. Part No.3142W203P
SGD1.48
Each (On a Reel of 800)
units
20 kΩ Surface Mount 1 Top Adjust 0.15W 3142 Tab 4mm ±25% - ±250ppm/°C - - -