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. 787-0682
Mfr. Part No.3314G-2-201E
BrandBourns
kr 12,801
Each (In a Pack of 10)
Units
200 Ω Surface Mount 1 Top Adjust 0.25W 3314 Gull Wing 5mm ±20% - ±100ppm/°C - - -
RS Stock No. 167-5279
Mfr. Part No.3314G-2-201E
BrandBourns
kr 7,914
Each (On a Reel of 500)
Units
200 Ω Surface Mount 1 Top Adjust 0.25W 3314 Gull Wing 5mm ±20% - ±100ppm/°C - - -
RS Stock No. 522-0732
Mfr. Part No.3329H-1-103LF
BrandBourns
kr 26,82
Each
Units
10 kΩ Through Hole 1 Top Adjust 0.5W 3329 Pin - ±10% - ±100ppm/°C - - -
RS Stock No. 167-3431
Mfr. Part No.3329H-1-103LF
BrandBourns
kr 14,508
Each (In a Tube of 50)
Units
10 kΩ Through Hole 1 Top Adjust 0.5W 3329 Pin - ±10% - ±100ppm/°C - - -
RS Stock No. 850-9678
Mfr. Part No.T73YP504KT20
BrandVishay
kr 4,262
Each (In a Pack of 1000)
Units
500 kΩ Through Hole 1 Top Adjust 0.18W T73 PC Pin 6.6mm ±10% - ±100ppm/°C - - -
RS Stock No. 167-5096
Mfr. Part No.3361P-1-102GLF
BrandBourns
kr 6,358
Each (On a Reel of 750)
Units
1 kΩ Surface Mount 1 Top Adjust 0.5W 3361 Pin 6.71mm ±10% - ±100ppm/°C - - -
RS Stock No. 167-3377
Mfr. Part No.3296W-1-103LF
BrandBourns
kr 20,758
Each (In a Tube of 50)
Units
10 kΩ Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS Stock No. 743-2410
Mfr. Part No.3361P-1-102GLF
BrandBourns
kr 11,27
Each
Units
1 kΩ Surface Mount 1 Top Adjust 0.5W 3361 Pin 6.71mm ±10% - ±100ppm/°C - - -
RS Stock No. 522-0827
Mfr. Part No.3329P-1-103LF
BrandBourns
kr 27,92
Each
Units
10 kΩ Through Hole 1 Top Adjust 1/2W 3329P Pin - ±10% - ±100ppm/°C 5.82mm 6.35 (Dia.) x 5.82mm -
RS Stock No. 521-9647
Mfr. Part No.3296W-1-103LF
BrandBourns
kr 27,29
Each
Units
10 kΩ Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS Stock No. 167-3424
Mfr. Part No.3329P-1-103LF
BrandBourns
kr 14,961
Each (In a Tube of 50)
Units
10 kΩ Through Hole 1 Top Adjust 0.5W 3329 Pin - ±10% - ±100ppm/°C - - -
RS Stock No. 167-3433
Mfr. Part No.3329H-1-502LF
BrandBourns
kr 15,641
Each (In a Tube of 50)
Units
5 kΩ Through Hole 1 Top Adjust 0.5W 3329 Pin - ±10% - ±100ppm/°C - - -
RS Stock No. 522-0798
Mfr. Part No.3329H-1-502LF
BrandBourns
kr 26,82
Each
Units
5 kΩ Through Hole 1 Top Adjust 0.5W 3329 Pin - ±10% - ±100ppm/°C - - -
RS Stock No. 167-3357
Mfr. Part No.3266W-1-502LF
BrandBourns
kr 23,709
Each (In a Tube of 50)
Units
5 kΩ Through Hole 12 Top Adjust 0.25W 3266 Pin 6.71mm ±10% - ±100ppm/°C - - -
RS Stock No. 167-9667
Mfr. Part No.M63M502KB40
BrandVishay
kr 15,06
Each (In a Box of 400)
Units
5 kΩ Through Hole 1 Top Adjust 0.5W 63M Pin 9.52mm ±10% - ±100ppm/°C - - -
RS Stock No. 167-9366
Mfr. Part No.T7YA103MT20
BrandVishay
kr 12,128
Each (In a Tube of 50)
Units
10 kΩ Through Hole 1 Top Adjust 0.5W T7 Pin - ±10% - ±100ppm/°C - - -
RS Stock No. 183-1322
Mfr. Part No.M63M502KB40
BrandVishay
kr 23,43
Each
Units
5 kΩ Through Hole 1 Top Adjust 0.5W 63M Pin 9.52mm ±10% - ±100ppm/°C - - -
RS Stock No. 521-9287
Mfr. Part No.3266W-1-502LF
BrandBourns
kr 39,78
Each
Units
5 kΩ Through Hole 12 Top Adjust 0.25W 3266 Pin 6.71mm ±10% - ±100ppm/°C - - -
RS Stock No. 374-6787
Mfr. Part No.T7YA103MT20
BrandVishay
kr 15,752
Each (In a Pack of 5)
Units
10 kΩ Through Hole 1 Top Adjust 0.5W T7 Pin - ±10% - ±100ppm/°C - - -
RS Stock No. 896-7226
Mfr. Part No.CT-6EX 5kR
kr 6,022
Each (In a Bag of 5)
Units
5 kΩ Through Hole 1 Side Adjust 0.5W CT6 Solder Pin 7mm ±10% - ±100ppm/°C - - 50 V