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. 763-7151
Mfr. Part No.Y40531K00000J0L
$47.20
Each
units
1kΩ Through Hole 21 Top Adjust 0.25W 1240 Solder Pin 6.35mm ±5% - ±10ppm/°C - - -
RS Stock No. 173-2942
Mfr. Part No.Y005620K0000K0L
$32.092
Each (In a Box of 100)
units
20kΩ Through Hole 26 Side Adjust 0.75W 1280G Solder Pin 19.05mm ±10% - ±15ppm/°C - - -
RS Stock No. 763-7167
Mfr. Part No.Y40535K00000J0L
$47.20
Each
units
5kΩ Through Hole 21 Top Adjust 0.25W 1240 Solder Pin 6.35mm ±5% - ±10ppm/°C - - -
RS Stock No. 763-7160
Mfr. Part No.Y40532K00000J0L
$64.50
Each
units
2kΩ Through Hole 21 Top Adjust 0.25W 1240 Solder Pin 6.35mm ±5% - ±10ppm/°C - - -
RS Stock No. 173-3003
Mfr. Part No.Y40535K00000J0L
$84.046
Each (In a Box of 25)
units
5kΩ Through Hole 21 Top Adjust 0.25W 1240 Solder Pin 6.35mm ±5% - ±10ppm/°C - - -
RS Stock No. 763-7163
Mfr. Part No.Y4053500R000J0L
$47.75
Each
units
500Ω Through Hole 21 Top Adjust 0.25W 1240 Solder Pin 6.35mm ±5% - ±10ppm/°C - - -
RS Stock No. 173-2996
Mfr. Part No.Y405310K0000J0L
$81.174
Each (In a Box of 25)
units
10kΩ Through Hole 21 Top Adjust 0.25W 1240 Solder Pin 6.35mm ±5% - ±10ppm/°C - - -
RS Stock No. 763-7173
Mfr. Part No.Y005620K0000K0L
$21.54
Each
units
20kΩ Through Hole 26 Side Adjust 0.75W 1280G Solder Pin 19.05mm ±10% - ±15ppm/°C - - -
RS Stock No. 763-7154
Mfr. Part No.Y4053100R000J0L
$65.05
Each
units
100Ω Through Hole 21 Top Adjust 0.25W 1240 Solder Pin 6.35mm ±5% - ±10ppm/°C - - -
RS Stock No. 763-7157
Mfr. Part No.Y405310K0000J0L
$50.15
Each
units
10kΩ Through Hole 21 Top Adjust 0.25W 1240 Solder Pin 6.35mm ±5% - ±10ppm/°C - - -
RS Stock No. 173-3022
Mfr. Part No.Y40532K00000J0L
$120.149
Each (In a Box of 25)
units
2kΩ Through Hole 21 Top Adjust 0.25W 1240 Solder Pin 6.35mm ±5% - ±10ppm/°C - - -
RS Stock No. 173-2997
Mfr. Part No.Y4053500R000J0L
$49.445
Each (In a Box of 25)
units
500Ω Through Hole 21 Top Adjust 0.25W 1240 Solder Pin 6.35mm ±5% - ±10ppm/°C - - -
RS Stock No. 173-3002
Mfr. Part No.Y4053100R000J0L
$94.328
Each (In a Box of 25)
units
100Ω Through Hole 21 Top Adjust 0.25W 1240 Solder Pin 6.35mm ±5% - ±10ppm/°C - - -
RS Stock No. 173-2951
Mfr. Part No.Y0056500R000K0L
$40.252
Each (In a Box of 100)
units
500Ω Through Hole 26 Side Adjust 0.75W 1280G Solder Pin 19.05mm ±10% - ±15ppm/°C - - -
RS Stock No. 763-7176
Mfr. Part No.Y0056100R000K0L
$24.04
Each
units
100Ω Through Hole 26 Side Adjust 0.75W 1280G Solder Pin 19.05mm ±10% - ±15ppm/°C - - -
RS Stock No. 763-7182
Mfr. Part No.Y0056500R000K0L
$35.00
Each
units
500Ω Through Hole 26 Side Adjust 0.75W 1280G Solder Pin 19.05mm ±10% - ±15ppm/°C - - -
RS Stock No. 173-3001
Mfr. Part No.Y40531K00000J0L
$84.046
Each (In a Box of 25)
units
1kΩ Through Hole 21 Top Adjust 0.25W 1240 Solder Pin 6.35mm ±5% - ±10ppm/°C - - -
RS Stock No. 173-2943
Mfr. Part No.Y0056100R000K0L
$34.856
Each (In a Box of 100)
units
100Ω Through Hole 26 Side Adjust 0.75W 1280G Solder Pin 19.05mm ±10% - ±15ppm/°C - - -