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. 167-5279
Mfr. Part No.3314G-2-201E
BrandBourns
kr 7,914
Each (On a Reel of 500)
Units
200Ω Surface Mount 1 Top Adjust 0.25W 3314 Gull Wing 5mm ±20% - ±100ppm/°C - - -
RS Stock No. 787-0682
Mfr. Part No.3314G-2-201E
BrandBourns
kr 12,801
Each (In a Pack of 10)
Units
200Ω 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
10kΩ 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
10kΩ 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
500kΩ Through Hole 1 Top Adjust 0.18W T73 PC Pin 6.6mm ±10% - ±100ppm/°C - - -
RS Stock No. 167-3377
Mfr. Part No.3296W-1-103LF
BrandBourns
kr 16,373
Each (In a Tube of 50)
Units
10kΩ Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS Stock No. 619-7784
Mfr. Part No.SV01A103AEA01R00
BrandMurata
kr 24,13
Each
Units
10kΩ Surface Mount 1 Top Adjust - SV01 Gull Wing 11mm ±30% - ±500ppm/°C - - -
RS Stock No. 521-9647
Mfr. Part No.3296W-1-103LF
BrandBourns
kr 22,73
Each
Units
10kΩ Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS Stock No. 166-9612
Mfr. Part No.SV01A103AEA01R00
BrandMurata
kr 8,012
Each (On a Reel of 1000)
Units
10kΩ Surface Mount - Top Adjust - SV01 Gull Wing 11mm ±30% - ±500ppm/°C - - -
RS Stock No. 169-2933
Mfr. Part No.SV01A103AEA01B00
BrandMurata
kr 12,969
Each (In a Bag of 50)
Units
10kΩ Surface Mount - Top Adjust - SV01 Gull Wing 11mm ±30% - ±500ppm/°C - - -
RS Stock No. 167-5096
Mfr. Part No.3361P-1-102GLF
BrandBourns
kr 6,358
Each (On a Reel of 750)
Units
1kΩ 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
10kΩ Through Hole 1 Top Adjust 1/2W 3329P Pin - ±10% - ±100ppm/°C 5.82mm 6.35 (Dia.) x 5.82mm -
RS Stock No. 167-3424
Mfr. Part No.3329P-1-103LF
BrandBourns
kr 14,961
Each (In a Tube of 50)
Units
10kΩ Through Hole 1 Top Adjust 0.5W 3329 Pin - ±10% - ±100ppm/°C - - -
RS Stock No. 743-2410
Mfr. Part No.3361P-1-102GLF
BrandBourns
kr 11,27
Each
Units
1kΩ Surface Mount 1 Top Adjust 0.5W 3361 Pin 6.71mm ±10% - ±100ppm/°C - - -
RS Stock No. 619-7778
Mfr. Part No.SV01A103AEA01B00
BrandMurata
kr 24,13
Each
Units
10kΩ Surface Mount - Top Adjust - SV01 Gull Wing 11mm ±30% - ±500ppm/°C - - -
RS Stock No. 522-0798
Mfr. Part No.3329H-1-502LF
BrandBourns
kr 26,82
Each
Units
5kΩ Through Hole 1 Top Adjust 0.5W 3329 Pin - ±10% - ±100ppm/°C - - -
RS Stock No. 521-9287
Mfr. Part No.3266W-1-502LF
BrandBourns
kr 34,10
Each
Units
5kΩ Through Hole 12 Top Adjust 0.25W 3266 Pin 6.71mm ±10% - ±100ppm/°C - - -
RS Stock No. 167-9366
Mfr. Part No.T7YA103MT20
BrandVishay
kr 12,128
Each (In a Tube of 50)
Units
10kΩ Through Hole 1 Top Adjust 0.5W T7 Pin - ±10% - ±100ppm/°C - - -
RS Stock No. 374-6787
Mfr. Part No.T7YA103MT20
BrandVishay
kr 15,752
Each (In a Pack of 5)
Units
10kΩ Through Hole 1 Top Adjust 0.5W T7 Pin - ±10% - ±100ppm/°C - - -
RS Stock No. 167-9667
Mfr. Part No.M63M502KB40
BrandVishay
kr 15,06
Each (In a Box of 400)
Units
5kΩ Through Hole 1 Top Adjust 0.5W 63M Pin 9.52mm ±10% - ±100ppm/°C - - -
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