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. 726-3857
Mfr. Part No.EVMAASA00B54
BrandPanasonic
$0.60
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. 172-3714
Mfr. Part No.EVMAASA00B54
BrandPanasonic
$0.473
Each (In a Box of 1000)
units
- Through Hole 1 Top Adjust 0.3W EVMAA Pin 7.8mm ±25% - ±200ppm/°C - - -
RS Stock No. 729-9881
Mfr. Part No.EVM3WSX80B54
BrandPanasonic
$0.492
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. 106-7951
Mfr. Part No.EVM3WSX80B54
BrandPanasonic
$1,216.44
1 Reel of 3000
Reel(s)
50 kΩ Surface Mount 1 Top Adjust 0.15W EVM3W Solder Pad 3.1mm ±25% - ±250ppm/°C - - -
RS Stock No. 726-3851
Mfr. Part No.EVMAASA00B15
BrandPanasonic
$0.516
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. 172-4474
Mfr. Part No.EVMAASA00B15
BrandPanasonic
$0.43
Each (In a Box of 1000)
units
- Through Hole 1 Top Adjust 0.3W EVMAA Pin 7.8mm ±25% - ±200ppm/°C - - -
RS Stock No. 106-8293
Mfr. Part No.EVM3YSX50B14
BrandPanasonic
$563.31
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. 172-4531
Mfr. Part No.EVM1DSX30B54
BrandPanasonic
$0.736
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. 731-2864
Mfr. Part No.EVM3YSX50B22
BrandPanasonic
$0.82
Each (In a Pack of 5)
units
200 Ω Surface Mount 1 Top Adjust 0.15W EVM3Y Solder Pad 3.1mm ±25% - ±250ppm/°C - - -
RS Stock No. 726-3810
Mfr. Part No.EVM1DSX30B54
BrandPanasonic
$0.516
Each (In a Pack of 5)
units
50 kΩ Surface Mount 1 Top Adjust 0.2W EVM1D Solder Pad 3.8mm ±25% - ±250ppm/°C - - -
RS Stock No. 106-8526
Mfr. Part No.EVM3YSX50B22
BrandPanasonic
$436.00
1 Reel of 2000
Reel(s)
200 Ω Surface Mount 1 Top Adjust 0.15W EVM3Y Solder Pad 3.1mm ±25% - ±250ppm/°C - - -
RS Stock No. 172-4102
Mfr. Part No.EVM3WSX80B52
BrandPanasonic
$0.413
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. 731-2883
Mfr. Part No.EVM3YSX50B14
BrandPanasonic
$0.506
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. 729-9869
Mfr. Part No.EVM3WSX80B52
BrandPanasonic
$0.534
Each (In a Pack of 5)
units
500 Ω 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
$0.328
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. 172-4475
Mfr. Part No.EVMAASA00B16
BrandPanasonic
$0.473
Each (In a Box of 1000)
units
- Through Hole 1 Top Adjust 0.3W EVMAA Pin 7.8mm ±25% - ±200ppm/°C - - -
RS Stock No. 726-3867
Mfr. Part No.EVMAASA00B16
BrandPanasonic
$0.424
Each (In a Pack of 5)
units
1 MΩ Through Hole 1 Top Adjust 0.3W EVMAA Pin 7.8mm ±25% - ±200ppm/°C - - -
RS Stock No. 726-3817
Mfr. Part No.EVM1DSX30B25
BrandPanasonic
$1.566
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. 172-4469
Mfr. Part No.EVM2WSX80B14
BrandPanasonic
$0.419
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. 726-3823
Mfr. Part No.EVMAASA00B12
BrandPanasonic
$0.49
Each (In a Pack of 5)
units
100 Ω Through Hole 1 Top Adjust 0.3W EVM1D Pin 7.8mm ±25% - ±200ppm/°C - - -