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. 172-4461
Mfr. Part No.EVM2NSX80B13
BrandPanasonic
TWD9.40
Each (On a Reel of 3000)
units
- Surface Mount 1 Top Adjust 0.15W EVM2N Solder Pad 2.2mm ±25% - ±250ppm/°C - - -
RS Stock No. 167-3234
Mfr. Part No.3224G-1-203E
BrandBourns
TWD86.60
Each (On a Reel of 500)
units
20 kΩ Surface Mount 12 Side Adjust 0.25W 3224 Gull Wing 4.8mm ±10% - ±100ppm/°C - - -
RS Stock No. 850-9678
Mfr. Part No.T73YP504KT20
BrandVishay
TWD17.50
Each (In a Pack of 1000)
units
500 kΩ Through Hole 1 Top Adjust 0.18W T73 PC Pin 6.6mm ±10% - ±100ppm/°C - - -
RS Stock No. 167-3405
Mfr. Part No.3296Y-1-103LF
BrandBourns
TWD72.90
Each (In a Tube of 50)
units
10 kΩ Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS Stock No. 167-9514
Mfr. Part No.M70Y103KB25
BrandVishay
TWD1,468.50
Each (In a Box of 50)
units
10 kΩ Through Hole 20 Side Adjust 1W 70Y Pin 33.53mm ±10% - ±100ppm/°C - - -
RS Stock No. 177-504
Mfr. Part No.3224W-1-503E
BrandBourns
TWD166.60
Each (In a Pack of 5)
units
50 kΩ Surface Mount 12 Top Adjust 0.25W 3224 J-Hook 4.8mm ±10% - ±100ppm/°C - - -
RS Stock No. 106-8187
Mfr. Part No.EVM2WSX80B13
BrandPanasonic
TWD8.10
Each (On a Reel of 3000)
units
1 kΩ Surface Mount 1 Top Adjust 0.15W EVM2W Solder Pad 2.2mm ±25% - ±250ppm/°C - - -
RS Stock No. 167-3533
Mfr. Part No.3224W-1-503E
BrandBourns
TWD109.10
Each (On a Reel of 250)
units
50 kΩ Surface Mount 12 Top Adjust 0.25W 3224 J-Hook 4.8mm ±10% - ±100ppm/°C - - -
RS Stock No. 691-2577
Mfr. Part No.3269W-1-202LF
BrandBourns
TWD161.00
Each
units
2 kΩ Surface Mount 12 Top Adjust 0.25W 3269 Gull Wing 6.35mm ±10% - ±100ppm/°C - - -
RS Stock No. 850-9625
Mfr. Part No.T73XX103KT20
BrandVishay
TWD32.00
Each
units
10 kΩ Through Hole 1 Side Adjust 0.5W T73 PC Pin 6.6mm ±10% - ±100ppm/°C - - -
RS Stock No. 850-9372
Mfr. Part No.TS63Y504KR10
BrandVishay
TWD75.00
Each (In a Pack of 500)
units
500 kΩ Surface Mount 14 Top Adjust 0.13W TS63 Solder 6.85mm ±10% - ±100ppm/°C - - -
RS Stock No. 162-221
Mfr. Part No.M43P502KB40
BrandVishay
TWD94.00
Each
units
5 kΩ 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 -
RS Stock No. 240-1556
Mfr. Part No.3214W-1-502E
BrandBourns
TWD102.40
Each (In a Pack of 5)
units
5 kΩ Surface Mount 5 Top Adjust 0.25W 3214 J-Hook 4.8mm ±10% - ±100ppm/°C - - -
RS Stock No. 729-9604
Mfr. Part No.EVM2NSX80B52
BrandPanasonic
TWD12.00
Each (In a Pack of 5)
units
500 Ω Surface Mount 1 Top Adjust 0.15W EVM2N Solder Pad 2.2mm ±25% - ±250ppm/°C - - -
RS Stock No. 522-0063
Mfr. Part No.3296Y-1-102LF
BrandBourns
TWD92.00
Each
units
1 kΩ Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS Stock No. 100-1177
Mfr. Part No.3314G-1-103E
BrandBourns
TWD50.60
Each (In a Pack of 10)
units
10 kΩ Surface Mount 1 Top Adjust 0.25W 3314 Gull Wing 5mm ±20% - ±100ppm/°C - - -
RS Stock No. 763-7173
Mfr. Part No.Y005620K0000K0L
TWD509.00
Each
units
20 kΩ Through Hole 26 Side Adjust 0.75W 1280G Solder Pin 19.05mm ±10% - ±15ppm/°C - - -
RS Stock No. 167-3378
Mfr. Part No.3296W-1-104LF
BrandBourns
TWD70.20
Each (In a Tube of 50)
units
100 kΩ Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS Stock No. 522-1000
Mfr. Part No.3362P-1-504LF
BrandBourns
TWD36.00
Each
units
500 kΩ Through Hole 1 Top Adjust 0.5W 3362 Pin 6.6mm ±10% - ±100ppm/°C - - -
RS Stock No. 731-2896
Mfr. Part No.EVM3YSX50B55
BrandPanasonic
TWD18.60
Each (In a Pack of 5)
units
500 kΩ Surface Mount 1 Top Adjust 0.15W EVM3Y Solder Pad 3.1mm ±25% - ±250ppm/°C - - -