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. 106-8189
Mfr. Part No.EVM2WSX80B53
BrandPanasonic
MYR2,670.72
1 Reel of 3000
Reel(s)
5 kΩ Surface Mount 1 Top Adjust 0.15W EVM2W Solder Pad 2.2mm ±25% - ±250ppm/°C - - -
RS Stock No. 729-9614
Mfr. Part No.EVM2NSX80B14
BrandPanasonic
MYR0.886
Each (In a Pack of 5)
units
10 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
MYR6.006
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. 106-7950
Mfr. Part No.EVM3YSX50B55
BrandPanasonic
MYR1,807.87
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. 106-8523
Mfr. Part No.EVM3YSX50B13
BrandPanasonic
MYR1,342.21
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. 172-4729
Mfr. Part No.EVMAASA00B13
BrandPanasonic
MYR1.31
Each (In a Box of 1000)
units
- Through Hole 1 Top Adjust 0.3W EVMAA Pin 7.8mm ±25% - ±200ppm/°C - - -
RS Stock No. 731-2896
Mfr. Part No.EVM3YSX50B55
BrandPanasonic
MYR8.106
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. 729-9604
Mfr. Part No.EVM2NSX80B52
BrandPanasonic
MYR6.326
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. 106-8196
Mfr. Part No.EVM2NSX80B52
BrandPanasonic
MYR2,259.84
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. 726-3839
Mfr. Part No.EVMAASA00B13
BrandPanasonic
MYR1.744
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. 726-3845
Mfr. Part No.EVMAASA00B14
BrandPanasonic
MYR6.498
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. 172-4472
Mfr. Part No.EVMAASA00B12
BrandPanasonic
MYR1.441
Each (In a Box of 1000)
units
- Through Hole 1 Top Adjust 0.3W EVM1D Pin 7.8mm ±25% - ±200ppm/°C - - -
RS Stock No. 729-9878
Mfr. Part No.EVM3WSX80B14
BrandPanasonic
MYR4.926
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. 729-9654
Mfr. Part No.EVM2WSX80B23
BrandPanasonic
MYR4.87
Each (In a Pack of 5)
units
2 kΩ Surface Mount 1 Top Adjust 0.15W EVM2W Solder Pad 2.2mm ±25% - ±250ppm/°C - - -
RS Stock No. 729-9862
Mfr. Part No.EVM3WSX80B13
BrandPanasonic
MYR4.782
Each (In a Pack of 5)
units
1 kΩ Surface Mount 1 Top Adjust 0.15W EVM3W Solder Pad 3.1mm ±25% - ±250ppm/°C - - -
RS Stock No. 726-3829
Mfr. Part No.EVM1DSX30B16
BrandPanasonic
MYR16.67
1 Pack of 5
Pack(s)
1 MΩ 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
MYR1.142
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. 106-8522
Mfr. Part No.EVM3WSX80B13
BrandPanasonic
MYR2,793.98
1 Reel of 3000
Reel(s)
1 kΩ Surface Mount 1 Top Adjust 0.15W EVM3W Solder Pad 3.1mm ±25% - ±250ppm/°C - - -
RS Stock No. 729-9667
Mfr. Part No.EVM2WSX80B14
BrandPanasonic
MYR6.766
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. 172-4087
Mfr. Part No.EVM3YSX50B52
BrandPanasonic
MYR0.973
Each (On a Reel of 2000)
units
- Surface Mount 1 Top Adjust 0.15W EVM3Y Solder Pad 3.1mm ±25% - ±250ppm/°C - - -