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. 167-5203
Mfr. Part No.3006P-7-103LF
BrandBourns
€1.694
Each (In a Tube of 25)
units
10 kΩ Through Hole 15 Side Adjust 0.75W 3006 Pin 19.05mm ±10% - ±100ppm/°C - - -
RS Stock No. 167-4446
Mfr. Part No.3223W-1-203E
BrandBourns
€1.672
Each (On a Reel of 500)
units
20 kΩ Surface Mount 11 Top Adjust 0.125W 3223 J-Hook 3.9mm ±20% - ±100ppm/°C - - -
RS Stock No. 522-0877
Mfr. Part No.3362P-1-101LF
BrandBourns
€1.13
Each
units
100 Ω Through Hole 1 Top Adjust 0.5W 3362 Pin 6.6mm ±10% - ±100ppm/°C - - -
RS Stock No. 167-3238
Mfr. Part No.3006P-1-201LF
BrandBourns
€1.384
Each (In a Tube of 25)
units
200 Ω Through Hole 15 Side Adjust 0.75W 3006 Pin 20.57mm ±10% - ±100ppm/°C - - -
RS Stock No. 619-7784
Mfr. Part No.SV01A103AEA01R00
BrandMurata
€2.08
Each
units
10 kΩ Surface Mount 1 Top Adjust - SV01 Gull Wing 11mm ±30% - ±500ppm/°C - - -
RS Stock No. 169-3110
Mfr. Part No.M43P105KB40
BrandVishay
€1.105
Each (In a Box of 200)
units
1 MΩ Through Hole 20 Side Adjust 0.5W 43P Pin 20.57mm ±10% - ±100ppm/°C - - -
RS Stock No. 169-2933
Mfr. Part No.SV01A103AEA01B00
BrandMurata
€1.131
Each (In a Bag of 50)
units
10 kΩ Surface Mount - Top Adjust - SV01 Gull Wing 11mm ±30% - ±500ppm/°C - - -
RS Stock No. 167-9436
Mfr. Part No.TS53YL103MR10
BrandVishay
€0.593
Each (On a Reel of 500)
units
10 kΩ Surface Mount 1 Top Adjust 0.25W TS53 Gull Wing 5mm ±20% - ±100ppm/°C - - -
RS Stock No. 522-0063
Mfr. Part No.3296Y-1-102LF
BrandBourns
€2.08
Each
units
1 kΩ Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS Stock No. 619-7778
Mfr. Part No.SV01A103AEA01B00
BrandMurata
€1.90
Each
units
10 kΩ Surface Mount - Top Adjust - SV01 Gull Wing 11mm ±30% - ±500ppm/°C - - -
RS Stock No. 169-3018
Mfr. Part No.M43P101KB40
BrandVishay
€1.105
Each (In a Box of 200)
units
100 Ω Through Hole 20 Side Adjust 0.5W 43P Pin 20.57mm ±10% - ±100ppm/°C - - -
RS Stock No. 154-1990
Mfr. Part No.M64W101KB40
BrandVishay
€1.94
Each
units
100 Ω Through Hole 19 (Electrical), 22 (Mechanical) Top Adjust 1/2W 64W Pin 9.7mm ±10% 5mm ±100ppm/°C 11.1mm 9.7 x 5 x 11.1mm -
RS Stock No. 691-2485
Mfr. Part No.3223W-1-203E
BrandBourns
€3.12
Each
units
20 kΩ Surface Mount 11 Top Adjust 0.125W 3223 J-Hook 3.9mm ±20% - ±100ppm/°C - - -
RS Stock No. 161-7054
Mfr. Part No.3006P-1-223LF
BrandBourns
€0.54
Each (In a Tube of 25)
units
22 kΩ Through Hole 15 Side Adjust 0.75W 3006 Pin 20.57mm ±10% - ±100ppm/°C - - -
RS Stock No. 521-9647
Mfr. Part No.3296W-1-103LF
BrandBourns
€2.02
Each
units
10 kΩ Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS Stock No. 743-2261
Mfr. Part No.3006P-7-203LF
BrandBourns
€0.72
Each
units
20 kΩ Through Hole 15 Side Adjust 0.75W 3006 Pin 19.05mm ±10% - ±100ppm/°C - - -
RS Stock No. 167-5319
Mfr. Part No.PV36W203C01B00
BrandBourns
€1.782
Each (In a Tube of 50)
units
20 kΩ Through Hole 25 Top Adjust 0.5W PV36 Solder Pin 9.6mm ±10% - ±100ppm/°C - - -
RS Stock No. 788-4990
Mfr. Part No.T18501KT10
BrandVishay
€1.20
Each (In a Pack of 5)
units
500 Ω Through Hole 15 Side Adjust 0.75W T18 Pin 19mm ±10% - - - - -
RS Stock No. 743-2457
Mfr. Part No.3386X-1-102LF
BrandBourns
€1.61
Each
units
1 kΩ Through Hole 1 Side Adjust 0.5W 3386 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS Stock No. 162-170
Mfr. Part No.M43P101KB40
BrandVishay
€1.97
Each
units
100 Ω 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 -
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