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. 154-2432
Mfr. Part No.M64Y103KB40
BrandVishay
SGD4.37
Each
units
10 kΩ 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. 169-3104
Mfr. Part No.M64Y103KB40
BrandVishay
SGD2.982
Each (In a Box of 200)
units
10 kΩ Through Hole 21 (Electrical), 23 (Mechanical) Top Adjust 0.5W 64Y Pin 9.7mm ±10% - ±100ppm/°C - - -
RS Stock No. 167-9659
Mfr. Part No.M63M104KB40
BrandVishay
SGD9.009
Each (In a Box of 400)
units
100 kΩ Through Hole 1 Top Adjust 0.5W 63M Pin 9.52mm ±10% - ±100ppm/°C - - -
RS Stock No. 183-1372
Mfr. Part No.M63M104KB40
BrandVishay
SGD16.96
Each
units
100 kΩ Through Hole 1 Top Adjust 0.5W 63M Pin 9.52mm ±10% - ±100ppm/°C - - -
RS Stock No. 167-9431
Mfr. Part No.TS53YJ501MR10
BrandVishay
SGD1.565
Each (On a Reel of 500)
units
500 Ω Surface Mount 1 Top Adjust 0.25W TS53 J-Hook 5mm ±20% - ±100ppm/°C - - -
RS Stock No. 277-0212
Mfr. Part No.M43P103KB30T601
BrandVishay
SGD10.37
Each
units
10 kΩ Panel Mount, Through Hole 20 Side Adjust 0.5W 43P Pin 27.81mm ±10% - ±100ppm/°C - - -
RS Stock No. 486-7582
Mfr. Part No.TS53YJ501MR10
BrandVishay
SGD2.04
Each (In a Pack of 5)
units
500 Ω Surface Mount 1 Top Adjust 0.25W TS53 J-Hook 5mm ±20% - ±100ppm/°C - - -
RS Stock No. 169-3117
Mfr. Part No.M63M103KB40
BrandVishay
SGD5.922
Each (In a Box of 200)
units
10 kΩ Through Hole 1 Top Adjust 0.5W 63M Pin 9.52mm ±10% - ±100ppm/°C - - -
RS Stock No. 167-9598
Mfr. Part No.M43P103KB30T601
BrandVishay
SGD6.833
Each (In a Box of 100)
units
10 kΩ Panel Mount, Through Hole 20 Side Adjust 0.5W 43P Pin 27.81mm ±10% - ±100ppm/°C - - -
RS Stock No. 183-1344
Mfr. Part No.M63M103KB40
BrandVishay
SGD10.69
Each
units
10 kΩ Through Hole 1 Top Adjust 0.5W 63M Pin 9.52mm ±10% - ±100ppm/°C - - -
RS Stock No. 162-2387
Mfr. Part No.M70Y503KB25
BrandVishay
SGD77.091
Each (In a Box of 50)
units
50 kΩ Through Hole 20 Side Adjust 1W 70Y Pin 33.53mm ±10% - ±100ppm/°C - - -
RS Stock No. 186-075
Mfr. Part No.M70Y503KB25
BrandVishay
SGD108.29
Each
units
50 kΩ Through Hole 20 Side Adjust 1W 70Y Pin 33.53mm ±10% - ±100ppm/°C - - -
RS Stock No. 169-3098
Mfr. Part No.M64Y101KB40
BrandVishay
SGD2.678
Each (In a Box of 200)
units
100 Ω Through Hole 21 (Electrical), 23 (Mechanical) Top Adjust 0.5W 64Y Pin 9.7mm ±10% - ±100ppm/°C - - -
RS Stock No. 167-9438
Mfr. Part No.TS53YL503MR10
BrandVishay
SGD1.39
Each (On a Reel of 500)
units
50 kΩ Surface Mount 1 Top Adjust 0.25W TS53 Gull Wing 5mm ±20% - ±100ppm/°C - - -
RS Stock No. 486-7548
Mfr. Part No.TS53YL503MR10
BrandVishay
SGD2.752
Each (In a Pack of 5)
units
50 kΩ Surface Mount 1 Top Adjust 0.25W TS53 Gull Wing 5mm ±20% - ±100ppm/°C - - -
RS Stock No. 154-2353
Mfr. Part No.M64Y101KB40
BrandVishay
SGD3.37
Each
units
100 Ω 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. 486-7627
Mfr. Part No.TS53YJ103MR10
BrandVishay
SGD2.194
Each (In a Pack of 5)
units
10 kΩ Surface Mount 1 Top Adjust 0.25W TS53 J-Hook 5mm ±20% - ±100ppm/°C - - -
RS Stock No. 169-3030
Mfr. Part No.M43P504KB40
BrandVishay
SGD2.44
Each (In a Box of 200)
units
500 kΩ Through Hole 20 Side Adjust 0.5W 43P Pin 20.57mm ±10% - ±100ppm/°C - - -
RS Stock No. 167-9351
Mfr. Part No.TSM4YL103KB25
BrandVishay
SGD8.77
Each (In a Box of 50)
units
10 kΩ Surface Mount 11 Top Adjust 0.25W TSM4 Gull Wing 4.8mm ±10% - ±100ppm/°C - - -
RS Stock No. 374-7005
Mfr. Part No.T63YB101KT20
BrandVishay
SGD5.26
Each
units
100 Ω Through Hole 14 Top Adjust 0.25W T63 Pin 6.8mm ±10% - ±100ppm/°C - - -