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. 166-9612
Mfr. Part No.SV01A103AEA01R00
BrandMurata
£0.697
Each (On a Reel of 1000)
Units
10kΩ Surface Mount - Top Adjust - SV01 Gull Wing 11mm ±30% - ±500ppm/°C - - -
RS Stock No. 522-0906
Mfr. Part No.3362P-1-104LF
BrandBourns
£1.06
Each
Units
100kΩ Through Hole 1 Top Adjust 0.5W 3362 Pin 6.6mm ±10% - ±100ppm/°C - - -
RS Stock No. 619-7784
Mfr. Part No.SV01A103AEA01R00
BrandMurata
£1.84
Each
Units
10kΩ Surface Mount 1 Top Adjust - SV01 Gull Wing 11mm ±30% - ±500ppm/°C - - -
RS Stock No. 167-3255
Mfr. Part No.3362P-1-104LF
BrandBourns
£0.61
Each (In a Tube of 50)
Units
100kΩ Through Hole 1 Top Adjust 0.5W 3362 Pin 6.6mm ±10% - ±100ppm/°C - - -
RS Stock No. 521-9041
Mfr. Part No.3006P-1-103LF
BrandBourns
£1.62
Each
Units
10kΩ Through Hole 15 Side Adjust 0.75W 3006 Pin 20.57mm ±10% - ±100ppm/°C - - -
RS Stock No. 522-0293
Mfr. Part No.3299W-1-103LF
BrandBourns
£2.72
Each
Units
10kΩ Through Hole 25 Top Adjust 0.5W 3299 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS Stock No. 167-3236
Mfr. Part No.3006P-1-103LF
BrandBourns
£1.273
Each (In a Tube of 25)
Units
10kΩ Through Hole 15 Side Adjust 0.75W 3006 Pin 20.57mm ±10% - ±100ppm/°C - - -
RS Stock No. 167-3388
Mfr. Part No.3299W-1-103LF
BrandBourns
£1.66
Each (In a Tube of 50)
Units
10kΩ Through Hole 25 Top Adjust 0.5W 3299 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS Stock No. 522-0978
Mfr. Part No.3362P-1-502LF
BrandBourns
£1.06
Each
Units
5kΩ Through Hole 1 Top Adjust 0.5W 3362 Pin 6.6mm ±10% - ±100ppm/°C - - -
RS Stock No. 167-3263
Mfr. Part No.3362P-1-502LF
BrandBourns
£0.62
Each (In a Tube of 50)
Units
5kΩ Through Hole 1 Top Adjust 0.5W 3362 Pin 6.6mm ±10% - ±100ppm/°C - - -
RS Stock No. 177-481
Mfr. Part No.3224W-1-103E
BrandBourns
£4.10
Each (In a Pack of 5)
Units
10kΩ Surface Mount 12 Top Adjust 0.25W 3224 J-Hook 4.8mm ±10% - ±100ppm/°C - - -
RS Stock No. 167-3531
Mfr. Part No.3224W-1-103E
BrandBourns
£1.79
Each (On a Reel of 250)
Units
10kΩ Surface Mount 12 Top Adjust 0.25W 3224 J-Hook 4.8mm ±10% - ±100ppm/°C - - -
RS Stock No. 167-3385
Mfr. Part No.3296W-1-203LF
BrandBourns
£1.684
Each (In a Tube of 50)
Units
20kΩ Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS Stock No. 521-9710
Mfr. Part No.3296W-1-203LF
BrandBourns
£2.22
Each
Units
20kΩ Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS Stock No. 167-3381
Mfr. Part No.3296X-1-103LF
BrandBourns
£1.684
Each (In a Tube of 50)
Units
10kΩ Through Hole 25 Side Adjust 0.5W 3296 Pin 11.05mm ±10% - ±100ppm/°C - - -
RS Stock No. 521-9861
Mfr. Part No.3296X-1-103LF
BrandBourns
£2.22
Each
Units
10kΩ Through Hole 25 Side Adjust 0.5W 3296 Pin 11.05mm ±10% - ±100ppm/°C - - -
RS Stock No. 522-0079
Mfr. Part No.3296Y-1-103LF
BrandBourns
£2.23
Each
Units
10kΩ Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS Stock No. 167-3405
Mfr. Part No.3296Y-1-103LF
BrandBourns
£1.694
Each (In a Tube of 50)
Units
10kΩ Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS Stock No. 522-2227
Mfr. Part No.3386F-1-103LF
BrandBourns
£1.30
Each
Units
10kΩ Through Hole 1 Top Adjust 0.5W 3386 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS Stock No. 154-2072
Mfr. Part No.M64W104KB40
BrandVishay
£2.01
Each
Units
100kΩ 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 -
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Bourns 3296 series Square trimpot trimming potentiometer/ resistor ...
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Multiturn / Cermet / Sealed Available in both ...
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Multiturn / Cermet / Sealed Available in both top and side adjustment Units can be pre-adjusted at clockwise, counter-clockwise or standard 50 % position Standoffs allow thorough PC board washing Chevron seal design For trimmer applications/processing guidelines.
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