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. 172-4753
Mfr. Part No.EVM1DSX30B13
BrandPanasonic
PHP24.193
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. 729-9651
Mfr. Part No.EVM2WSX80B13
BrandPanasonic
PHP71.194
Each (In a Pack of 5)
units
1kΩ Surface Mount 1 Top Adjust 0.15W EVM2W Solder Pad 2.2mm ±25% - ±250ppm/°C - - -
RS Stock No. 106-8187
Mfr. Part No.EVM2WSX80B13
BrandPanasonic
PHP32,537.70
1 Reel of 3000
Reel(s)
1kΩ Surface Mount 1 Top Adjust 0.15W EVM2W Solder Pad 2.2mm ±25% - ±250ppm/°C - - -
RS Stock No. 726-3790
Mfr. Part No.EVM1DSX30B13
BrandPanasonic
PHP221.31
1 Pack of 5
Pack(s)
1kΩ Surface Mount 1 Top Adjust 0.2W EVM1D Solder Pad 3.8mm ±25% - ±250ppm/°C - - -
RS Stock No. 729-9689
Mfr. Part No.EVM2WSX80B16
BrandPanasonic
PHP71.194
Each (In a Pack of 5)
units
1MΩ Surface Mount 1 Top Adjust 0.15W EVM2W Solder Pad 2.2mm ±25% - ±250ppm/°C - - -
RS Stock No. 729-9626
Mfr. Part No.EVM2NSX80B54
BrandPanasonic
PHP71.194
Each (In a Pack of 5)
units
50kΩ Surface Mount 1 Top Adjust 0.15W EVM2N Solder Pad 2.2mm ±25% - ±250ppm/°C - - -
RS Stock No. 726-3813
Mfr. Part No.EVM1DSX30B15
BrandPanasonic
PHP33.028
Each (In a Pack of 5)
units
100kΩ Surface Mount 1 Top Adjust 0.2W EVM1D Solder Pad 3.8mm ±25% - ±250ppm/°C - - -
RS Stock No. 729-9667
Mfr. Part No.EVM2WSX80B14
BrandPanasonic
PHP71.194
Each (In a Pack of 5)
units
10kΩ Surface Mount 1 Top Adjust 0.15W EVM2W Solder Pad 2.2mm ±25% - ±250ppm/°C - - -
RS Stock No. 729-9875
Mfr. Part No.EVM3WSX80B53
BrandPanasonic
PHP71.194
Each (In a Pack of 5)
units
5kΩ 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
PHP71.194
Each (In a Pack of 5)
units
50kΩ Surface Mount 1 Top Adjust 0.15W EVM3W Solder Pad 3.1mm ±25% - ±250ppm/°C - - -
RS Stock No. 729-9664
Mfr. Part No.EVM2WSX80B54
BrandPanasonic
PHP29.578
Each (In a Pack of 5)
units
50kΩ Surface Mount 1 Top Adjust 0.15W EVM2W Solder Pad 2.2mm ±25% - ±250ppm/°C - - -
RS Stock No. 729-9610
Mfr. Part No.EVM2NSX80B53
BrandPanasonic
PHP56.362
Each (In a Pack of 5)
units
5kΩ Surface Mount 1 Top Adjust 0.15W EVM2N Solder Pad 2.2mm ±25% - ±250ppm/°C - - -
RS Stock No. 726-3835
Mfr. Part No.EVMAASA00B52
BrandPanasonic
PHP73.418
Each (In a Pack of 5)
units
500Ω Through Hole 1 Top Adjust 0.3W EVMAA Pin 7.8mm ±25% - ±200ppm/°C - - -
RS Stock No. 726-3857
Mfr. Part No.EVMAASA00B54
BrandPanasonic
PHP24.03
Each (In a Pack of 5)
units
50kΩ Through Hole 1 Top Adjust 0.3W EVMAA Pin 7.8mm ±25% - ±200ppm/°C - - -
RS Stock No. 729-9632
Mfr. Part No.EVM2NSX80B55
BrandPanasonic
PHP64.00
Each (In a Pack of 5)
units
500kΩ Surface Mount 1 Top Adjust 0.15W EVM2N Solder Pad 2.2mm ±25% - ±250ppm/°C - - -
RS Stock No. 731-2906
Mfr. Part No.EVM3YSX50B16
BrandPanasonic
PHP30.17
Each (In a Pack of 5)
units
1MΩ Surface Mount 1 Top Adjust 0.15W EVM3Y Solder Pad 3.1mm ±25% - ±250ppm/°C - - -
RS Stock No. 172-4152
Mfr. Part No.EVM1DSX30B53
BrandPanasonic
PHP24.193
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. 729-9869
Mfr. Part No.EVM3WSX80B52
BrandPanasonic
PHP71.194
Each (In a Pack of 5)
units
500Ω Surface Mount 1 Top Adjust 0.15W EVM3W Solder Pad 3.1mm ±25% - ±250ppm/°C - - -
RS Stock No. 172-4473
Mfr. Part No.EVMAASA00B52
BrandPanasonic
PHP15.57
Each (In a Box of 1000)
units
- Through Hole 1 Top Adjust 0.3W EVMAA Pin 7.8mm ±25% - ±200ppm/°C - - -
RS Stock No. 731-2864
Mfr. Part No.EVM3YSX50B22
BrandPanasonic
PHP55.176
Each (In a Pack of 5)
units
200Ω Surface Mount 1 Top Adjust 0.15W EVM3Y Solder Pad 3.1mm ±25% - ±250ppm/°C - - -