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. 652-4697
Mfr. Part No.409VA103M
HK$11.87
Each
units
10 kΩ Through Hole 1 Side Adjust 0.5W 409 Pin 9mm ±20% - ±250ppm/°C - - -
RS Stock No. 168-0257
Mfr. Part No.409VA103M
HK$6.23
Each (On a Reel of 1000)
units
10 kΩ Through Hole 1 Side Adjust 0.5W 409 Pin 9mm ±20% - ±250ppm/°C - - -
RS Stock No. 652-4259
Mfr. Part No.416PA101M
HK$4.931
Each (In a Pack of 10)
units
100 Ω Through Hole 1 Top Adjust 0.2W 416 Pin 6.8mm ±20% - ±250ppm/°C - - -
RS Stock No. 168-0369
Mfr. Part No.416PA101M
HK$3.964
Each (On a Reel of 1000)
units
100 Ω Through Hole 1 Top Adjust 0.2W 416 Pin 6.8mm ±20% - ±250ppm/°C - - -
RS Stock No. 652-4805
Mfr. Part No.3213X103M
HK$14.97
Each (In a Pack of 5)
units
10 kΩ Surface Mount 1 Top Adjust 0.125W 3213 J-Hook 3.4mm ±20% - ±100ppm/°C - - -
RS Stock No. 500-2720
Mfr. Part No.3204X502P
HK$10.442
Each (In a Pack of 5)
units
5 kΩ Surface Mount 1 Top Adjust 0.1W 3204 J-Hook 5mm ±25% - ±250ppm/°C - - -
RS Stock No. 753-6815
Mfr. Part No.3142W201P
HK$11.98
Each
units
200 kΩ Surface Mount 1 Top Adjust 0.15W 3142 Tab 4mm ±25% - ±250ppm/°C - - -
RS Stock No. 652-4192
Mfr. Part No.416MA201P
HK$5.20
Each (In a Pack of 10)
units
200 Ω Through Hole 1 Top Adjust 0.2W 416 Pin 6.8mm ±25% - ±250ppm/°C - - -
RS Stock No. 652-4287
Mfr. Part No.416PA102M
HK$5.45
Each (In a Pack of 10)
units
1 kΩ Through Hole 1 Top Adjust 0.2W 416 Pin 6.8mm ±20% - ±250ppm/°C - - -
RS Stock No. 652-4243
Mfr. Part No.416MA504P
HK$5.884
Each (In a Pack of 10)
units
500 kΩ Through Hole 1 Top Adjust 0.2W 416 Pin 6.8mm ±25% - ±250ppm/°C - - -
RS Stock No. 652-4811
Mfr. Part No.409VA503M
HK$10.87
Each (In a Pack of 5)
units
50 kΩ Through Hole 1 Side Adjust 0.5W 409 Pin 9mm ±20% - ±250ppm/°C - - -
RS Stock No. 186-176
Mfr. Part No.PC910 4K7 RS
HK$72.97
Each
units
4.7 kΩ Through Hole 1 Top Adjust 1W PC910 Pin - ±20% - - - - -
RS Stock No. 163-9526
Mfr. Part No.409HA102M
HK$4.43
Each (In a Box of 500)
units
1 kΩ Through Hole 1 Top Adjust 0.5W 409 Pin 9mm ±20% - ±250ppm/°C - - -
RS Stock No. 754-2135
Mfr. Part No.3203X104P
HK$23.95
Each
units
100 kΩ Surface Mount 1 Top Adjust 0.05W 3203 Tab 3.4mm ±20% - ±100ppm/°C - - -
RS Stock No. 652-4675
Mfr. Part No.409VA202M
HK$7.832
Each (In a Pack of 5)
units
2 kΩ Through Hole 1 Side Adjust 0.5W 409 Pin 9mm ±20% - ±250ppm/°C - - -
RS Stock No. 652-4170
Mfr. Part No.416MA103P
HK$6.965
Each (In a Pack of 10)
units
10 kΩ Through Hole 1 Top Adjust 0.2W 416 Pin 6.8mm ±25% - ±250ppm/°C - - -
RS Stock No. 652-4912
Mfr. Part No.416MA104P
HK$5.27
Each (In a Pack of 10)
units
100 kΩ Through Hole 1 Top Adjust 0.2W 416 Pin 6.8mm ±25% - ±250ppm/°C - - -
RS Stock No. 161-9952
Mfr. Part No.409VA202M
HK$4.347
Each (In a Box of 500)
units
2 kΩ Through Hole 1 Side Adjust 0.5W 409 Pin 9mm ±20% - ±250ppm/°C - - -
RS Stock No. 163-9452
Mfr. Part No.3213X103M
HK$8.30
Each (On a Reel of 500)
units
10 kΩ Surface Mount 1 Top Adjust 0.125W 3213 J-Hook 3.4mm ±20% - ±100ppm/°C - - -
RS Stock No. 162-1633
Mfr. Part No.CB10LV471M
HK$2.068
Each (In a Box of 1000)
units
470 Ω Through Hole 1 Top Adjust 0.15W CB10 Pin 11mm ±20% - ±500ppm/°C - - -