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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Omschrijving Prijs Maximum Resistance Mounting Type Number of Turns Orientation Power Rating Series Termination Style Length Tolerance Depth Temperature Coefficient Height Dimensions Maximum Voltage Rating
RS-stocknr. 161-7037
Fabrikantnummer3329H-1-223LF
FabrikantBourns
1,105 €
Each (In a Tube of 50)
Aantal stuks
22 kΩ Through Hole 1 Top Adjust 0.5W 3329 Solder Pin - ±10% - ±100ppm/°C - - -
RS-stocknr. 796-4813
Fabrikantnummer3329H-1-223LF
FabrikantBourns
1,82 €
Each
Aantal stuks
22 kΩ Through Hole 1 Top Adjust 0.5W 3329 Solder Pin - ±10% - ±100ppm/°C - - -
RS-stocknr. 521-9647
Fabrikantnummer3296W-1-103LF
FabrikantBourns
2,83 €
Each
Aantal stuks
10 kΩ Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS-stocknr. 167-3377
Fabrikantnummer3296W-1-103LF
FabrikantBourns
2,11 €
Each (In a Tube of 50)
Aantal stuks
10 kΩ Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS-stocknr. 167-3357
Fabrikantnummer3266W-1-502LF
FabrikantBourns
2,593 €
Each (In a Tube of 50)
Aantal stuks
5 kΩ Through Hole 12 Top Adjust 0.25W 3266 Pin 6.71mm ±10% - ±100ppm/°C - - -
RS-stocknr. 521-9287
Fabrikantnummer3266W-1-502LF
FabrikantBourns
4,43 €
Each
Aantal stuks
5 kΩ Through Hole 12 Top Adjust 0.25W 3266 Pin 6.71mm ±10% - ±100ppm/°C - - -
RS-stocknr. 169-3027
FabrikantnummerM43P104KB40
FabrikantVishay
1,346 €
Each (In a Box of 200)
Aantal stuks
100 kΩ Through Hole 20 Side Adjust 0.5W 43P Pin 20.57mm ±10% - ±100ppm/°C - - -
RS-stocknr. 167-3549
FabrikantnummerTC33X-2-103E
FabrikantBourns
0,107 €
Each (On a Reel of 2500)
Aantal stuks
10 kΩ Surface Mount 1 Top Adjust 0.1W TC33 Solder Pad 3mm ±25% - ±250ppm/°C - - -
RS-stocknr. 161-7033
Fabrikantnummer3386H-1-222LF
FabrikantBourns
1,039 €
Each (In a Tube of 50)
Aantal stuks
2.2 kΩ Through Hole 1 Side Adjust 0.5W 3386 Solder Pin 9.53mm ±10% - ±100ppm/°C - - -
RS-stocknr. 162-265
FabrikantnummerM43P104KB40
FabrikantVishay
2,52 €
Each
Aantal stuks
100 kΩ Through Hole 20 Side Adjust 1/2W 43P Pin 20.57mm ±10% 4.83mm ±100ppm/°C 6.35mm 20.57 x 4.83 x 6.35mm -
RS-stocknr. 167-4566
Fabrikantnummer3269W-1-103LF
FabrikantBourns
2,717 €
Each (In a Tube of 50)
Aantal stuks
10 kΩ Surface Mount 12 Top Adjust 0.25W 3269 Gull Wing 6.35mm ±10% - ±100ppm/°C - - -
RS-stocknr. 785-9688
Fabrikantnummer3386H-1-222LF
FabrikantBourns
0,85 €
Each
Aantal stuks
2.2 kΩ Through Hole 1 Side Adjust 0.5W 3386 Solder Pin 9.53mm ±10% - ±100ppm/°C - - -
RS-stocknr. 461-7135
FabrikantnummerTC33X-2-103E
FabrikantBourns
0,192 €
Each (In a Pack of 50)
Aantal stuks
10 kΩ Surface Mount 1 Top Adjust 0.1W TC33 Solder Pad 3mm ±25% - ±250ppm/°C - - -
RS-stocknr. 691-2552
Fabrikantnummer3269W-1-103LF
FabrikantBourns
4,84 €
Each
Aantal stuks
10 kΩ Surface Mount 12 Top Adjust 0.25W 3269 Gull Wing 6.35mm ±10% - ±100ppm/°C - - -
RS-stocknr. 169-3022
FabrikantnummerM43P202KB40
FabrikantVishay
1,112 €
Each (In a Box of 200)
Aantal stuks
2 kΩ Through Hole 20 Side Adjust 0.5W 43P Pin 20.57mm ±10% - ±100ppm/°C - - -
RS-stocknr. 162-215
FabrikantnummerM43P202KB40
FabrikantVishay
2,27 €
Each
Aantal stuks
2 kΩ Through Hole 20 Side Adjust 1/2W 43P Pin 20.57mm ±10% 4.83mm ±100ppm/°C 6.35mm 20.57 x 4.83 x 6.35mm -
RS-stocknr. 521-9530
Fabrikantnummer3296P-1-202LF
FabrikantBourns
2,32 €
Each
Aantal stuks
2 kΩ Through Hole 25 Side Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS-stocknr. 167-9598
FabrikantnummerM43P103KB30T601
FabrikantVishay
2,494 €
Each (In a Box of 100)
Aantal stuks
10 kΩ Panel Mount, Through Hole 20 Side Adjust 0.5W 43P Pin 27.81mm ±10% - ±100ppm/°C - - -
RS-stocknr. 167-3362
Fabrikantnummer3266W-1-103LF
FabrikantBourns
3,035 €
Each (In a Tube of 50)
Aantal stuks
10 kΩ Through Hole 12 Top Adjust 0.25W 3266 Pin 6.71mm ±10% - ±100ppm/°C - - -
RS-stocknr. 167-3387
Fabrikantnummer3299W-1-102LF
FabrikantBourns
1,926 €
Each (In a Tube of 50)
Aantal stuks
1 kΩ Through Hole 25 Top Adjust 0.5W 3299 Pin 9.53mm ±10% - ±100ppm/°C - - -