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 Prix Maximum Resistance Mounting Type Number of Turns Orientation Power Rating Series Termination Style Length Tolerance Depth Temperature Coefficient Height Dimensions Maximum Voltage Rating
N° de stock RS 521-9596
Référence fabricant3296P-1-503LF
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2,25 €
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50kΩ Through Hole 25 Side Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
N° de stock RS 521-9186
Référence fabricant3266W-1-102LF
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3,75 €
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1kΩ Through Hole 12 Top Adjust 0.25W 3266 Pin 6.71mm ±10% - ±100ppm/°C - - -
N° de stock RS 154-1962
Référence fabricantM64W100KB40
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2,03 €
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10Ω Through Hole 19 (Electrical), 22 (Mechanical) Top Adjust 1/2W 64W Pin 9.7mm ±10% 5mm 0 → +200ppm/°C 11.1mm 9.7 x 5 x 11.1mm -
N° de stock RS 167-3379
Référence fabricant3296W-1-105LF
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1,45 €
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1MΩ Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
N° de stock RS 169-3070
Référence fabricantM64W100KB40
MarqueVishay
2,193 €
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10Ω Through Hole 19 (Electrical), 22 (Mechanical) Top Adjust 0.5W 64W Pin 9.7mm ±10% - 0 → +200ppm/°C - - -
N° de stock RS 769-2167
Référence fabricantPV36W103C01B00
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1,35 €
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10kΩ Through Hole 25 Top Adjust 0.5W PV36 Solder Pin 9.6mm ±10% - ±100ppm/°C - - -
N° de stock RS 169-3104
Référence fabricantM64Y103KB40
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1,125 €
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10kΩ Through Hole 19 (Electrical), 22 (Mechanical) Top Adjust 0.5W 64Y Pin 9.7mm ±10% - ±100ppm/°C - - -
N° de stock RS 154-2432
Référence fabricantM64Y103KB40
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2,02 €
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10kΩ 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 -
N° de stock RS 788-5114
Référence fabricantT93YB103KT20
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1,248 €
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10kΩ Through Hole 21 (Electrical) Turns, 23 (Mechanical) Turns Top Adjust 0.5W T93 Pin 9.7mm ±10% - ±100ppm/°C - - -
N° de stock RS 167-3388
Référence fabricant3299W-1-103LF
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1,926 €
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10kΩ Through Hole 25 Top Adjust 0.5W 3299 Pin 9.53mm ±10% - ±100ppm/°C - - -
N° de stock RS 850-9463
Référence fabricantM63X103KB40
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1,251 €
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10kΩ Through Hole 1 Side Adjust 0.5W 63 Solder - ±10% - ±100ppm/°C - - -
N° de stock RS 522-2744
Référence fabricant3386P-1-203LF
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1,58 €
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20kΩ Through Hole 1 Top Adjust 0.5W 3386 Pin 9.53mm ±10% - ±100ppm/°C - - -
N° de stock RS 522-0293
Référence fabricant3299W-1-103LF
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3,16 €
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10kΩ Through Hole 25 Top Adjust 0.5W 3299 Pin 9.53mm ±10% - ±100ppm/°C - - -
N° de stock RS 521-9877
Référence fabricant3296X-1-104LF
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2,32 €
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100kΩ Through Hole 25 Side Adjust 0.5W 3296 Pin 11.05mm ±10% - ±100ppm/°C - - -
N° de stock RS 161-6881
Référence fabricant93R1A-R22-A20L
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3,831 €
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100kΩ Panel Mount, Through Hole 1 Side Adjust 2W 93 Pin 34.7mm ±10% - ±150ppm/°C - - -
N° de stock RS 522-5333
Référence fabricant93R1A-R22-A20L
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5,72 €
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100kΩ Panel Mount, Through Hole 1 Side Adjust 2W 93 Pin 34.7mm ±10% - ±150ppm/°C - - -
N° de stock RS 769-2164
Référence fabricantPV36W105C01B00
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1,38 €
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1MΩ Through Hole 25 Top Adjust 0.5W PV36 Solder Pin 9.6mm ±10% - ±100ppm/°C - - -
N° de stock RS 169-3084
Référence fabricantM64W504KB40
MarqueVishay
1,182 €
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500kΩ Through Hole 19 (Electrical), 22 (Mechanical) Top Adjust 0.5W 64W Pin 9.7mm ±10% - - - - -
N° de stock RS 277-0183
Référence fabricantM43P102KB30T601
MarqueVishay
3,62 €
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1kΩ Panel Mount, Through Hole 20 Side Adjust 0.5W 43P Pin 27.81mm ±10% - ±100ppm/°C - - -
N° de stock RS 154-2101
Référence fabricantM64W504KB40
MarqueVishay
1,86 €
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500kΩ Through Hole 19 (Electrical), 22 (Mechanical) Top Adjust 1/2W 64W Pin 9.7mm ±10% 5mm - 11.1mm 9.7 x 5 x 11.1mm -