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 youll 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. 726-3851
Mfr. Part No.EVMAASA00B15
BrandPanasonic
kr 1,368
Each (In a Pack of 5)
Units
100 kΩ Through Hole 1 Top Adjust 0.3W EVMAA Pin 7.8mm ±25% - ±200ppm/°C - - -
RS Stock No. 731-2906
Mfr. Part No.EVM3YSX50B16
BrandPanasonic
kr 1,02
Each (In a Pack of 5)
Units
1 MΩ Surface Mount 1 Top Adjust 0.15W EVM3Y Solder Pad 3.1mm ±25% - ±250ppm/°C - - -
RS Stock No. 172-4104
Mfr. Part No.EVM2WSX80B23
BrandPanasonic
kr 2,196
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. 106-8196
Mfr. Part No.EVM2NSX80B52
BrandPanasonic
kr 1,065
Each (On a Reel of 3000)
Units
500 Ω Surface Mount 1 Top Adjust 0.15W EVM2N Solder Pad 2.2mm ±25% - ±250ppm/°C - - -
RS Stock No. 172-4467
Mfr. Part No.EVM3WSX80B25
BrandPanasonic
kr 2,378
Each (On a Reel of 3000)
Units
- Surface Mount 1 Top Adjust 0.15W EVM3W Solder Pad 3.1mm ±25% - ±250ppm/°C - - -
RS Stock No. 172-4461
Mfr. Part No.EVM2NSX80B13
BrandPanasonic
kr 1,065
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. 731-2896
Mfr. Part No.EVM3YSX50B55
BrandPanasonic
kr 1,02
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. 106-7951
Mfr. Part No.EVM3WSX80B54
BrandPanasonic
kr 1,171
Each (On a Reel of 3000)
Units
50 kΩ Surface Mount 1 Top Adjust 0.15W EVM3W Solder Pad 3.1mm ±25% - ±250ppm/°C - - -
RS Stock No. 729-9881
Mfr. Part No.EVM3WSX80B54
BrandPanasonic
kr 1,212
Each (In a Pack of 5)
Units
50 kΩ Surface Mount 1 Top Adjust 0.15W EVM3W Solder Pad 3.1mm ±25% - ±250ppm/°C - - -
RS Stock No. 106-8189
Mfr. Part No.EVM2WSX80B53
BrandPanasonic
kr 1,825
Each (On a Reel of 3000)
Units
5 kΩ Surface Mount 1 Top Adjust 0.15W EVM2W Solder Pad 2.2mm ±25% - ±250ppm/°C - - -
RS Stock No. 729-9639
Mfr. Part No.EVM2NSX80B25
BrandPanasonic
kr 7,816
Each (In a Pack of 5)
Units
200 kΩ Surface Mount 1 Top Adjust 0.15W EVM2N Solder Pad 2.2mm ±25% - ±250ppm/°C - - -
RS Stock No. 731-2883
Mfr. Part No.EVM3YSX50B14
BrandPanasonic
kr 3,868
Each (In a Pack of 5)
Units
10 kΩ Surface Mount 1 Top Adjust 0.15W EVM3Y Solder Pad 3.1mm ±25% - ±250ppm/°C - - -
RS Stock No. 729-9626
Mfr. Part No.EVM2NSX80B54
BrandPanasonic
kr 5,264
Each (In a Pack of 5)
Units
50 kΩ Surface Mount 1 Top Adjust 0.15W EVM2N Solder Pad 2.2mm ±25% - ±250ppm/°C - - -
RS Stock No. 729-9878
Mfr. Part No.EVM3WSX80B14
BrandPanasonic
kr 3,15
Each (In a Pack of 5)
Units
10 kΩ Surface Mount 1 Top Adjust 0.15W EVM3W Solder Pad 3.1mm ±25% - ±250ppm/°C - - -
RS Stock No. 726-3839
Mfr. Part No.EVMAASA00B13
BrandPanasonic
kr 3,23
Each (In a Pack of 5)
Units
1 kΩ Through Hole 1 Top Adjust 0.3W EVMAA Pin 7.8mm ±25% - ±200ppm/°C - - -
RS Stock No. 726-3857
Mfr. Part No.EVMAASA00B54
BrandPanasonic
kr 3,23
Each (In a Pack of 5)
Units
50 kΩ Through Hole 1 Top Adjust 0.3W EVMAA Pin 7.8mm ±25% - ±200ppm/°C - - -
RS Stock No. 172-4105
Mfr. Part No.EVM2WSX80B16
BrandPanasonic
kr 1,19
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. 729-9604
Mfr. Part No.EVM2NSX80B52
BrandPanasonic
kr 1,074
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. 172-4530
Mfr. Part No.EVM1DSX30B23
BrandPanasonic
kr 2,648
Each (On a Reel of 1000)
Units
- Surface Mount 1 Top Adjust 0.2W EVM1D Solder Pad 3.8mm ±25% - ±250ppm/°C - - -
RS Stock No. 172-4101
Mfr. Part No.EVM3WSX80B23
BrandPanasonic
kr 1,171
Each (On a Reel of 3000)
Units
- Surface Mount 1 Top Adjust 0.15W EVM3W Solder Pad 3.1mm ±25% - ±250ppm/°C - - -