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. 144-2185
Mfr. Part No.82PR10KLFTB
MYR5.05
Each (In a Pack of 5)
units
10kΩ Through Hole 1 Top Adjust 0.5W 82 Solder Pin - ±10% - ±100ppm/°C - - 200 V dc
RS Stock No. 144-2187
Mfr. Part No.67WR100KLF
MYR6.454
Each (In a Pack of 5)
units
100kΩ Through Hole 20 Top Adjust 0.5W 67 Solder Pin 9.53mm ±10% - ±100ppm/°C - - 200 V dc
RS Stock No. 144-2121
Mfr. Part No.93PR100KLF
MYR10.242
Each (In a Box of 50)
units
100kΩ Through Hole 1 Top Adjust 1W 93 Solder Pin - ±10% - ±100ppm/°C - - 200 V dc
RS Stock No. 144-2105
Mfr. Part No.64WR20KLF
MYR6.207
Each (In a Tube of 50)
units
20kΩ Through Hole 12 Top Adjust 0.25 W @ 85 °C 64 Solder Pin 6.35mm ±10% - ±100ppm/°C - - 200 V dc
RS Stock No. 144-2078
Mfr. Part No.64WR5KLF
MYR6.207
Each (In a Tube of 50)
units
5kΩ Through Hole 12 Top Adjust 0.25 W @ 85 °C 64 Solder Pin 6.35mm ±10% - ±100ppm/°C - - 200 V dc
RS Stock No. 144-2059
Mfr. Part No.44WR10KLFT7
MYR9.741
Each (On a Reel of 250)
units
10kΩ Surface Mount 9 Top Adjust 0.25 W @ 85 °C 44 Solder Pin 4.83mm ±10% - ±100ppm/°C - - 300 V dc
RS Stock No. 144-2106
Mfr. Part No.64WR100KLF
MYR6.207
Each (In a Tube of 50)
units
100kΩ Through Hole 12 Top Adjust 0.25 W @ 85 °C 64 Solder Pin 6.35mm ±10% - ±100ppm/°C - - 200 V dc
RS Stock No. 144-2055
Mfr. Part No.67XR10KLF
MYR4.734
Each (In a Box of 50)
units
10kΩ Through Hole 20 Side Adjust 0.5W 67 Solder Pin 11.11mm ±10% - ±100ppm/°C - - 200 V dc
RS Stock No. 144-2220
Mfr. Part No.67YR5KLF
MYR6.208
Each (In a Pack of 5)
units
5kΩ Through Hole 20 Top Adjust 0.5W 67 Solder Pin 9.53mm ±10% - ±100ppm/°C - - 200 V dc
RS Stock No. 144-2232
Mfr. Part No.67PR10KLF
MYR6.624
Each (In a Pack of 5)
units
10kΩ Through Hole 20 Side Adjust 0.5W 67 Solder Pin 9.53mm ±10% - ±100ppm/°C - - 200 V dc
RS Stock No. 144-2079
Mfr. Part No.93PR1KLF
MYR10.242
Each (In a Box of 50)
units
1kΩ Through Hole 1 Top Adjust 1W 93 Solder Pin - ±10% - ±100ppm/°C - - 200 V dc
RS Stock No. 144-2239
Mfr. Part No.82PR1KLFTB
MYR5.392
Each (In a Pack of 5)
units
1kΩ Through Hole 1 Top Adjust 0.5W 82 Solder Pin - ±10% - ±100ppm/°C - - 200 V dc
RS Stock No. 144-2246
Mfr. Part No.44WR100KLFT7
MYR15.69
Each
units
100kΩ Surface Mount 9 Top Adjust 0.25 W @ 85 °C 44 Solder Pin 4.83mm ±10% - ±100ppm/°C - - 300 V dc
RS Stock No. 144-2095
Mfr. Part No.44WR1KLFT7
MYR9.741
Each (On a Reel of 250)
units
1kΩ Surface Mount 9 Top Adjust 0.25 W @ 85 °C 44 Solder Pin 4.83mm ±10% - ±100ppm/°C - - 300 V dc
RS Stock No. 144-2074
Mfr. Part No.90PR1KLFTB
MYR6.169
Each (In a Tube of 25)
units
1kΩ Through Hole 20 Side Adjust 0.75W 90 Solder Pin 19.05mm ±10% - ±100ppm/°C - - 200 V dc
RS Stock No. 144-2068
Mfr. Part No.72PTR100KLF
MYR7.35
Each (In a Box of 100)
units
100kΩ Through Hole 1 Top Adjust 0.5W 72 Solder Pin 9.53mm ±10% - ±100ppm/°C - - 200 V dc
RS Stock No. 144-2243
Mfr. Part No.67WR10KLF
MYR6.488
Each (In a Pack of 5)
units
10kΩ Through Hole 20 Top Adjust 0.5W 67 Solder Pin 9.53mm ±10% - ±100ppm/°C - - 200 V dc
RS Stock No. 144-2217
Mfr. Part No.44WR2KLFT7
MYR15.53
Each
units
2kΩ Surface Mount 9 Top Adjust 0.25 W @ 85 °C 44 Solder Pin 4.83mm ±10% - ±100ppm/°C - - 300 V dc
RS Stock No. 144-2188
Mfr. Part No.64YR2KLF
MYR9.43
Each
units
2kΩ Through Hole 12 Top Adjust 0.25 W @ 85 °C 64 Solder Pin 6.35mm ±10% - ±100ppm/°C - - 200 V dc
RS Stock No. 144-2190
Mfr. Part No.64YR20KLF
MYR9.434
Each (In a Pack of 5)
units
20kΩ Through Hole 12 Top Adjust 0.25 W @ 85 °C 64 Solder Pin 6.35mm ±10% - ±100ppm/°C - - 200 V dc