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. 729-9608
Mfr. Part No.EVM2NSX80B13
BrandPanasonic
TWD12.20
Each (In a Pack of 5)
units
1 kΩ Surface Mount 1 Top Adjust 0.15W EVM2N Solder Pad 2.2mm ±25% - ±250ppm/°C - - -
RS Stock No. 172-4461
Mfr. Part No.EVM2NSX80B13
BrandPanasonic
TWD8.10
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. 729-9632
Mfr. Part No.EVM2NSX80B55
BrandPanasonic
TWD8.60
Each (In a Pack of 5)
units
500 kΩ Surface Mount 1 Top Adjust 0.15W EVM2N Solder Pad 2.2mm ±25% - ±250ppm/°C - - -
RS Stock No. 729-9667
Mfr. Part No.EVM2WSX80B14
BrandPanasonic
TWD13.40
Each (In a Pack of 5)
units
10 kΩ Surface Mount 1 Top Adjust 0.15W EVM2W Solder Pad 2.2mm ±25% - ±250ppm/°C - - -
RS Stock No. 106-7950
Mfr. Part No.EVM3YSX50B55
BrandPanasonic
TWD9,218.00
1 Reel of 2000
Reel(s)
500 kΩ Surface Mount 1 Top Adjust 0.15W EVM3Y Solder Pad 3.1mm ±25% - ±250ppm/°C - - -
RS Stock No. 729-9651
Mfr. Part No.EVM2WSX80B13
BrandPanasonic
TWD18.80
Each (In a Pack of 5)
units
1 kΩ Surface Mount 1 Top Adjust 0.15W EVM2W Solder Pad 2.2mm ±25% - ±250ppm/°C - - -
RS Stock No. 172-4469
Mfr. Part No.EVM2WSX80B14
BrandPanasonic
TWD9.90
Each (On a Reel of 3000)
units
- Surface Mount 1 Top Adjust 0.15W EVM2W Solder Pad 2.2mm ±25% - ±250ppm/°C - - -
RS Stock No. 731-2896
Mfr. Part No.EVM3YSX50B55
BrandPanasonic
TWD6.40
Each (In a Pack of 5)
units
500 kΩ Surface Mount 1 Top Adjust 0.15W EVM3Y Solder Pad 3.1mm ±25% - ±250ppm/°C - - -
RS Stock No. 106-8187
Mfr. Part No.EVM2WSX80B13
BrandPanasonic
TWD24,300.00
1 Reel of 3000
Reel(s)
1 kΩ Surface Mount 1 Top Adjust 0.15W EVM2W Solder Pad 2.2mm ±25% - ±250ppm/°C - - -
RS Stock No. 106-8196
Mfr. Part No.EVM2NSX80B52
BrandPanasonic
TWD16,500.00
1 Reel of 3000
Reel(s)
500 Ω Surface Mount 1 Top Adjust 0.15W EVM2N Solder Pad 2.2mm ±25% - ±250ppm/°C - - -
RS Stock No. 729-9604
Mfr. Part No.EVM2NSX80B52
BrandPanasonic
TWD12.20
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. 106-8290
Mfr. Part No.EVM2NSX80B53
BrandPanasonic
TWD17,100.00
1 Reel of 3000
Reel(s)
5 kΩ Surface Mount 1 Top Adjust 0.15W EVM2N Solder Pad 2.2mm ±25% - ±250ppm/°C - - -
RS Stock No. 106-8523
Mfr. Part No.EVM3YSX50B13
BrandPanasonic
TWD9,800.00
1 Reel of 2000
Reel(s)
1 kΩ Surface Mount 1 Top Adjust 0.15W EVM3Y Solder Pad 3.1mm ±25% - ±250ppm/°C - - -
RS Stock No. 729-9623
Mfr. Part No.EVM2NSX80B24
BrandPanasonic
TWD7.40
Each (In a Pack of 5)
units
20 kΩ Surface Mount 1 Top Adjust 0.15W EVM2N Solder Pad 2.2mm ±25% - ±250ppm/°C - - -
RS Stock No. 729-9610
Mfr. Part No.EVM2NSX80B53
BrandPanasonic
TWD9.00
Each (In a Pack of 5)
units
5 kΩ Surface Mount 1 Top Adjust 0.15W EVM2N Solder Pad 2.2mm ±25% - ±250ppm/°C - - -
RS Stock No. 731-2877
Mfr. Part No.EVM3YSX50B13
BrandPanasonic
TWD26.80
Each (In a Pack of 5)
units
1 kΩ Surface Mount 1 Top Adjust 0.15W EVM3Y Solder Pad 3.1mm ±25% - ±250ppm/°C - - -
RS Stock No. 172-4105
Mfr. Part No.EVM2WSX80B16
BrandPanasonic
TWD9.90
Each (On a Reel of 3000)
units
- Surface Mount 1 Top Adjust 0.15W EVM2W Solder Pad 2.2mm ±25% - ±250ppm/°C - - -
RS Stock No. 106-8193
Mfr. Part No.EVM2NSX80B24
BrandPanasonic
TWD21,300.00
1 Reel of 3000
Reel(s)
20 kΩ Surface Mount 1 Top Adjust 0.15W EVM2N Solder Pad 2.2mm ±25% - ±250ppm/°C - - -
RS Stock No. 729-9601
Mfr. Part No.EVM2NSX80B22
BrandPanasonic
TWD19.20
Each (In a Pack of 5)
units
200 Ω Surface Mount 1 Top Adjust 0.15W EVM2N Solder Pad 2.2mm ±25% - ±250ppm/°C - - -
RS Stock No. 726-3797
Mfr. Part No.EVM1DSX30B52
BrandPanasonic
TWD27.60
Each (In a Pack of 5)
units
500 Ω Surface Mount 1 Top Adjust 0.2W EVM1D Solder Pad 3.8mm ±25% - ±250ppm/°C - - -