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. 769-2173
Mfr. Part No.PV36W201C01B00
BrandBourns
€1.47
Each
units
200Ω Through Hole 25 Top Adjust 0.5W PV36 Solder Pin 9.6mm ±10% - ±100ppm/°C - - -
RS Stock No. 167-3242
Mfr. Part No.3006P-1-502LF
BrandBourns
€1.384
Each (In a Tube of 25)
units
5kΩ Through Hole 15 Side Adjust 0.75W 3006 Pin 20.57mm ±10% - ±100ppm/°C - - -
RS Stock No. 374-7077
Mfr. Part No.T63YB103KT20
BrandVishay
€3.02
Each
units
10kΩ Through Hole 14 Top Adjust 0.25W T63 Pin 6.8mm ±10% - ±100ppm/°C - - -
RS Stock No. 521-9631
Mfr. Part No.3296W-1-102LF
BrandBourns
€2.25
Each
units
1kΩ Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS Stock No. 161-7067
Mfr. Part No.3296Y-1-505LF
BrandBourns
€1.43
Each (In a Tube of 50)
units
5MΩ Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS Stock No. 172-4475
Mfr. Part No.EVMAASA00B16
BrandPanasonic
€0.274
Each (In a Box of 1000)
units
- Through Hole 1 Top Adjust 0.3W EVMAA Pin 7.8mm ±25% - ±200ppm/°C - - -
RS Stock No. 167-4565
Mfr. Part No.3269P-1-103LF
BrandBourns
€3.123
Each (In a Tube of 50)
units
10kΩ Surface Mount 12 Side Adjust 0.25W 3269 Gull Wing 6.35mm ±10% - ±100ppm/°C - - -
RS Stock No. 161-5567
Mfr. Part No.PC910 47K RS
€6.42
Each (In a Box of 100)
units
47kΩ Through Hole 1 Top Adjust 1W PC910 Pin - ±20% - - - - -
RS Stock No. 691-2533
Mfr. Part No.3269P-1-103LF
BrandBourns
€4.17
Each
units
10kΩ Surface Mount 12 Side Adjust 0.25W 3269 Gull Wing 6.35mm ±10% - ±100ppm/°C - - -
RS Stock No. 521-9805
Mfr. Part No.3296W-1-503LF
BrandBourns
€1.94
Each
units
50kΩ Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS Stock No. 521-9136
Mfr. Part No.3006P-1-502LF
BrandBourns
€1.70
Each
units
5kΩ Through Hole 15 Side Adjust 0.75W 3006 Pin 20.57mm ±10% - ±100ppm/°C - - -
RS Stock No. 167-9661
Mfr. Part No.M63M203KB30T607
BrandVishay
€1.883
Each (In a Box of 400)
units
20kΩ Through Hole 1 Top Adjust 0.5W 63M Pin 9.52mm ±10% - ±100ppm/°C - - -
RS Stock No. 167-3378
Mfr. Part No.3296W-1-104LF
BrandBourns
€1.417
Each (In a Tube of 50)
units
100kΩ Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS Stock No. 167-3235
Mfr. Part No.3006P-1-101LF
BrandBourns
€1.384
Each (In a Tube of 25)
units
100Ω Through Hole 15 Side Adjust 0.75W 3006 Pin 20.57mm ±10% - ±100ppm/°C - - -
RS Stock No. 167-3330
Mfr. Part No.3314G-1-105E
BrandBourns
€0.919
Each (On a Reel of 500)
units
1MΩ Surface Mount 1 Top Adjust 0.25W 3314 Gull Wing 5mm ±20% - ±100ppm/°C - - -
RS Stock No. 521-9754
Mfr. Part No.3296W-1-253LF
BrandBourns
€2.07
Each
units
25kΩ Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS Stock No. 522-0243
Mfr. Part No.3296Y-1-505LF
BrandBourns
€2.08
Each
units
5MΩ Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS Stock No. 173-2943
Mfr. Part No.Y0056100R000K0L
€15.755
Each (In a Box of 100)
units
100Ω Through Hole 26 Side Adjust 0.75W 1280G Solder Pin 19.05mm ±10% - ±15ppm/°C - - -
RS Stock No. 167-3376
Mfr. Part No.3296W-1-102LF
BrandBourns
€1.385
Each (In a Tube of 50)
units
1kΩ Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS Stock No. 763-7176
Mfr. Part No.Y0056100R000K0L
€18.27
Each
units
100Ω Through Hole 26 Side Adjust 0.75W 1280G Solder Pin 19.05mm ±10% - ±15ppm/°C - - -
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