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. 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. 521-9805
Fabrikantnummer3296W-1-503LF
FabrikantBourns
€ 2,05
Each
Aantal stuks
50 kΩ Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS-stocknr. 167-5229
Fabrikantnummer3296Z-1-102LF
FabrikantBourns
€ 1,438
Each (In a Tube of 50)
Aantal stuks
1 kΩ Through Hole 25 Side Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS-stocknr. 521-9209
Fabrikantnummer3266W-1-104LF
FabrikantBourns
€ 4,23
Each
Aantal stuks
100 kΩ Through Hole 12 Top Adjust 0.25W 3266 Pin 6.71mm ±10% - ±100ppm/°C - - -
RS-stocknr. 167-3436
Fabrikantnummer3386G-1-103LF
FabrikantBourns
€ 0,947
Each (In a Tube of 50)
Aantal stuks
10 kΩ Through Hole 1 Top Adjust 0.5W 3386 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS-stocknr. 522-2485
Fabrikantnummer3386G-1-103LF
FabrikantBourns
€ 1,58
Each
Aantal stuks
10 kΩ Through Hole 1 Top Adjust 0.5W 3386 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS-stocknr. 167-3362
Fabrikantnummer3266W-1-103LF
FabrikantBourns
€ 2,664
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. 167-5232
Fabrikantnummer3329H-1-104LF
FabrikantBourns
€ 1,891
Each (In a Tube of 50)
Aantal stuks
100 kΩ Through Hole 1 Top Adjust 0.5W 3329 Pin - ±10% - ±100ppm/°C - - -
RS-stocknr. 522-2693
Fabrikantnummer3386P-1-103LF
FabrikantBourns
€ 1,43
Each
Aantal stuks
10 kΩ Through Hole 1 Top Adjust 0.5W 3386 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS-stocknr. 167-3470
Fabrikantnummer3386P-1-103LF
FabrikantBourns
€ 1,07
Each (In a Tube of 50)
Aantal stuks
10 kΩ Through Hole 1 Top Adjust 0.5W 3386 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS-stocknr. 743-2390
Fabrikantnummer3329H-1-104LF
FabrikantBourns
€ 3,13
Each
Aantal stuks
100 kΩ Through Hole 1 Top Adjust 0.5W 3329 Pin - ±10% - ±100ppm/°C - - -
RS-stocknr. 521-9192
Fabrikantnummer3266W-1-103LF
FabrikantBourns
€ 3,70
Each
Aantal stuks
10 kΩ Through Hole 12 Top Adjust 0.25W 3266 Pin 6.71mm ±10% - ±100ppm/°C - - -
RS-stocknr. 522-0732
Fabrikantnummer3329H-1-103LF
FabrikantBourns
€ 3,07
Each
Aantal stuks
10 kΩ Through Hole 1 Top Adjust 0.5W 3329 Pin - ±10% - ±100ppm/°C - - -
RS-stocknr. 521-9631
Fabrikantnummer3296W-1-102LF
FabrikantBourns
€ 2,56
Each
Aantal stuks
1 kΩ Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS-stocknr. 521-9798
Fabrikantnummer3296W-1-502LF
FabrikantBourns
€ 2,56
Each
Aantal stuks
5 kΩ Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS-stocknr. 167-3376
Fabrikantnummer3296W-1-102LF
FabrikantBourns
€ 1,909
Each (In a Tube of 50)
Aantal stuks
1 kΩ Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS-stocknr. 850-9625
FabrikantnummerT73XX103KT20
FabrikantVishay
€ 0,90
Each
Aantal stuks
10 kΩ Through Hole 1 Side Adjust 0.5W T73 PC Pin 6.6mm ±10% - ±100ppm/°C - - -
RS-stocknr. 167-3491
Fabrikantnummer3296W-1-502LF
FabrikantBourns
€ 1,909
Each (In a Tube of 50)
Aantal stuks
5 kΩ Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS-stocknr. 167-3354
Fabrikantnummer3266W-1-203LF
FabrikantBourns
€ 2,664
Each (In a Tube of 50)
Aantal stuks
20 kΩ Through Hole 12 Top Adjust 0.25W 3266 Pin 6.71mm ±10% - ±100ppm/°C - - -
RS-stocknr. 521-9259
Fabrikantnummer3266W-1-203LF
FabrikantBourns
€ 3,70
Each
Aantal stuks
20 kΩ Through Hole 12 Top Adjust 0.25W 3266 Pin 6.71mm ±10% - ±100ppm/°C - - -