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. 172-4532
Mfr. Part No.EVM1DSX30B15
BrandPanasonic
HK$4.339
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. 726-3813
Mfr. Part No.EVM1DSX30B15
BrandPanasonic
HK$3.098
Each (In a Pack of 5)
units
100 kΩ Surface Mount 1 Top Adjust 0.2W EVM1D Solder Pad 3.8mm ±25% - ±250ppm/°C - - -
RS Stock No. 172-4467
Mfr. Part No.EVM3WSX80B25
BrandPanasonic
HK$1.476
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. 106-8292
Mfr. Part No.EVM3WSX80B14
BrandPanasonic
HK$4,345.20
1 Reel of 3000
Reel(s)
10 kΩ Surface Mount 1 Top Adjust 0.15W EVM3W Solder Pad 3.1mm ±25% - ±250ppm/°C - - -
RS Stock No. 106-8196
Mfr. Part No.EVM2NSX80B52
BrandPanasonic
HK$3,983.10
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. 729-9689
Mfr. Part No.EVM2WSX80B16
BrandPanasonic
HK$2.36
Each (In a Pack of 5)
units
1 MΩ Surface Mount 1 Top Adjust 0.15W EVM2W Solder Pad 2.2mm ±25% - ±250ppm/°C - - -
RS Stock No. 106-8290
Mfr. Part No.EVM2NSX80B53
BrandPanasonic
HK$4,127.94
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. 729-9610
Mfr. Part No.EVM2NSX80B53
BrandPanasonic
HK$1.584
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. 172-4104
Mfr. Part No.EVM2WSX80B23
BrandPanasonic
HK$2.045
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. 106-8293
Mfr. Part No.EVM3YSX50B14
BrandPanasonic
HK$2,820.00
1 Reel of 2000
Reel(s)
10 kΩ Surface Mount 1 Top Adjust 0.15W EVM3Y Solder Pad 3.1mm ±25% - ±250ppm/°C - - -
RS Stock No. 172-4753
Mfr. Part No.EVM1DSX30B13
BrandPanasonic
HK$3.946
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. 729-9664
Mfr. Part No.EVM2WSX80B54
BrandPanasonic
HK$2.03
Each (In a Pack of 5)
units
50 kΩ Surface Mount 1 Top Adjust 0.15W EVM2W Solder Pad 2.2mm ±25% - ±250ppm/°C - - -
RS Stock No. 172-4449
Mfr. Part No.EVM3YSX50B53
BrandPanasonic
HK$1.716
Each (On a Reel of 2000)
units
- Surface Mount 1 Top Adjust 0.15W EVM3Y Solder Pad 3.1mm ±25% - ±250ppm/°C - - -
RS Stock No. 106-7950
Mfr. Part No.EVM3YSX50B55
BrandPanasonic
HK$2,297.60
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. 726-3860
Mfr. Part No.EVMAASA00B25
BrandPanasonic
HK$1.828
Each (In a Pack of 5)
units
200 kΩ Through Hole 1 Top Adjust 0.3W EVMAA Pin 7.8mm ±25% - ±200ppm/°C - - -
RS Stock No. 726-3817
Mfr. Part No.EVM1DSX30B25
BrandPanasonic
HK$9.84
Each (In a Pack of 5)
units
200 kΩ Surface Mount 1 Top Adjust 0.2W EVM1D Solder Pad 3.8mm ±25% - ±250ppm/°C - - -
RS Stock No. 726-3845
Mfr. Part No.EVMAASA00B14
BrandPanasonic
HK$5.632
Each (In a Pack of 5)
units
10 kΩ Through Hole 1 Top Adjust 0.3W EVMAA Pin 7.8mm ±25% - ±200ppm/°C - - -
RS Stock No. 729-9639
Mfr. Part No.EVM2NSX80B25
BrandPanasonic
HK$3.46
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. 172-3710
Mfr. Part No.EVM2WSX80B54
BrandPanasonic
HK$2.045
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. 172-4469
Mfr. Part No.EVM2WSX80B14
BrandPanasonic
HK$2.248
Each (On a Reel of 3000)
units
- Surface Mount 1 Top Adjust 0.15W EVM2W Solder Pad 2.2mm ±25% - ±250ppm/°C - - -