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. 521-9085
Mfr. Part No.3006P-1-202LF
BrandBourns
SGD3.36
Each
units
2kΩ Through Hole 15 Side Adjust 0.75W 3006 Pin 20.57mm ±10% - ±100ppm/°C - - -
RS Stock No. 850-9735
Mfr. Part No.Y00565K00000K0L
SGD30.20
Each
units
5kΩ Through Hole 26 Side Adjust 0.75W 1280 PC Pin 19.05mm ±10% - ±15ppm/°C - - -
RS Stock No. 486-7582
Mfr. Part No.TS53YJ501MR10
BrandVishay
SGD2.176
Each (In a Pack of 5)
units
500Ω Surface Mount 1 Top Adjust 0.25W TS53 J-Hook 5mm ±20% - ±100ppm/°C - - -
RS Stock No. 522-0350
Mfr. Part No.3299W-1-203LF
BrandBourns
SGD5.03
Each
units
20kΩ Through Hole 25 Top Adjust 0.5W 3299 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS Stock No. 183-1344
Mfr. Part No.M63M103KB40
BrandVishay
SGD4.33
Each
units
10kΩ Through Hole 1 Top Adjust 0.5W 63M Pin 9.52mm ±10% - ±100ppm/°C - - -
RS Stock No. 521-9209
Mfr. Part No.3266W-1-104LF
BrandBourns
SGD5.83
Each
units
100kΩ Through Hole 12 Top Adjust 0.25W 3266 Pin 6.71mm ±10% - ±100ppm/°C - - -
RS Stock No. 169-3117
Mfr. Part No.M63M103KB40
BrandVishay
SGD4.494
Each (In a Box of 200)
units
10kΩ Through Hole 1 Top Adjust 0.5W 63M Pin 9.52mm ±10% - ±100ppm/°C - - -
RS Stock No. 277-0212
Mfr. Part No.M43P103KB30T601
BrandVishay
SGD8.41
Each
units
10kΩ Panel Mount, Through Hole 20 Side Adjust 0.5W 43P Pin 27.81mm ±10% - ±100ppm/°C - - -
RS Stock No. 167-3350
Mfr. Part No.3266W-1-104LF
BrandBourns
SGD4.292
Each (In a Tube of 50)
units
100kΩ Through Hole 12 Top Adjust 0.25W 3266 Pin 6.71mm ±10% - ±100ppm/°C - - -
RS Stock No. 167-9431
Mfr. Part No.TS53YJ501MR10
BrandVishay
SGD1.372
Each (On a Reel of 500)
units
500Ω Surface Mount 1 Top Adjust 0.25W TS53 J-Hook 5mm ±20% - ±100ppm/°C - - -
RS Stock No. 521-9136
Mfr. Part No.3006P-1-502LF
BrandBourns
SGD2.91
Each
units
5kΩ Through Hole 15 Side Adjust 0.75W 3006 Pin 20.57mm ±10% - ±100ppm/°C - - -
RS Stock No. 167-3242
Mfr. Part No.3006P-1-502LF
BrandBourns
SGD2.303
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. 167-3421
Mfr. Part No.3299W-1-203LF
BrandBourns
SGD3.508
Each (In a Tube of 50)
units
20kΩ Through Hole 25 Top Adjust 0.5W 3299 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS Stock No. 167-9598
Mfr. Part No.M43P103KB30T601
BrandVishay
SGD3.928
Each (In a Box of 100)
units
10kΩ Panel Mount, Through Hole 20 Side Adjust 0.5W 43P Pin 27.81mm ±10% - ±100ppm/°C - - -
RS Stock No. 769-2167
Mfr. Part No.PV36W103C01B00
BrandBourns
SGD2.22
Each
units
10kΩ Through Hole 25 Top Adjust 0.5W PV36 Solder Pin 9.6mm ±10% - ±100ppm/°C - - -
RS Stock No. 162-2387
Mfr. Part No.M70Y503KB25
BrandVishay
SGD61.858
Each (In a Box of 50)
units
50kΩ Through Hole 20 Side Adjust 1W 70Y Pin 33.53mm ±10% - ±100ppm/°C - - -
RS Stock No. 851-7483
Mfr. Part No.RJ24FW103
BrandBourns
SGD7.00
Each
units
10kΩ Panel Mount 25 - 0.5W RJ24 PC Pin 11.55mm ±10% - - - - -
RS Stock No. 186-075
Mfr. Part No.M70Y503KB25
BrandVishay
SGD22.13
Each
units
50kΩ Through Hole 20 Side Adjust 1W 70Y Pin 33.53mm ±10% - ±100ppm/°C - - -
RS Stock No. 154-2353
Mfr. Part No.M64Y101KB40
BrandVishay
SGD3.16
Each
units
100Ω Through Hole 19 (Electrical), 22 (Mechanical) Top Adjust 1/2W 64Y Pin 9.7mm ±10% 5mm ±100ppm/°C 11.1mm 9.7 x 5 x 11.1mm -
RS Stock No. 521-9798
Mfr. Part No.3296W-1-502LF
BrandBourns
SGD3.56
Each
units
5kΩ Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -