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庫存編號 521-9647
製造零件編號3296W-1-103LF
BrandBourns
HK$18.83
單位
10 kΩ Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS庫存編號 167-3377
製造零件編號3296W-1-103LF
BrandBourns
HK$15.247
毎管:50 個
單位
10 kΩ Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS庫存編號 161-6955
製造零件編號3362P-1-223LF
BrandBourns
HK$4.046
毎管:50 個
單位
22 kΩ Through Hole 1 Top Adjust 0.5W 3362 Pin 6.6mm ±10% - ±100ppm/°C - - -
RS庫存編號 522-1000
製造零件編號3362P-1-504LF
BrandBourns
HK$5.95
單位
500 kΩ Through Hole 1 Top Adjust 0.5W 3362 Pin 6.6mm ±10% - ±100ppm/°C - - -
RS庫存編號 167-3491
製造零件編號3296W-1-502LF
BrandBourns
HK$13.709
毎管:50 個
單位
5 kΩ Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS庫存編號 521-9798
製造零件編號3296W-1-502LF
BrandBourns
HK$14.47
單位
5 kΩ Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS庫存編號 691-6951
製造零件編號3312J-1-202E
BrandBourns
HK$17.00
單位
2 kΩ Surface Mount 1 Side Adjust 0.1W 3312 J-Hook 2.5mm ±20% - ±100ppm/°C - - -
RS庫存編號 167-3265
製造零件編號3362P-1-504LF
BrandBourns
HK$6.649
毎管:50 個
單位
500 kΩ Through Hole 1 Top Adjust 0.5W 3362 Pin 6.6mm ±10% - ±100ppm/°C - - -
RS庫存編號 787-0544
製造零件編號3362P-1-223LF
BrandBourns
HK$8.13
單位
22 kΩ Through Hole 1 Top Adjust 0.5W 3362 Pin 6.6mm ±10% - ±100ppm/°C - - -
RS庫存編號 167-4457
製造零件編號3312J-1-202E
BrandBourns
HK$11.661
個 (在毎卷:500)
單位
2 kΩ Surface Mount 1 Side Adjust 0.1W 3312 J-Hook 2.5mm ±20% - ±100ppm/°C - - -
RS庫存編號 522-0726
製造零件編號3329H-1-102LF
BrandBourns
HK$16.61
單位
1 kΩ Through Hole 1 Top Adjust 0.5W 3329 Pin - ±10% - ±100ppm/°C - - -
RS庫存編號 167-3430
製造零件編號3329H-1-102LF
BrandBourns
HK$11.855
毎管:50 個
單位
1 kΩ Through Hole 1 Top Adjust 0.5W 3329 Pin - ±10% - ±100ppm/°C - - -
RS庫存編號 167-3550
製造零件編號TC33X-2-104E
BrandBourns
HK$2,600.00
毎卷:2500 個
Reel(s)
100 kΩ Surface Mount 1 Top Adjust 0.1W TC33 Solder Pad 3mm ±25% - ±250ppm/°C - - -
RS庫存編號 521-9631
製造零件編號3296W-1-102LF
BrandBourns
HK$15.86
單位
1 kΩ Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS庫存編號 521-9625
製造零件編號3296W-1-101LF
BrandBourns
HK$17.94
單位
100 Ω Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS庫存編號 167-3376
製造零件編號3296W-1-102LF
BrandBourns
HK$13.709
毎管:50 個
單位
1 kΩ Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS庫存編號 167-3497
製造零件編號3296W-1-101LF
BrandBourns
HK$13.709
毎管:50 個
單位
100 Ω Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS庫存編號 769-2170
製造零件編號PV36W203C01B00
BrandBourns
HK$20.71
單位
20 kΩ Through Hole 25 Top Adjust 0.5W PV36 Solder Pin 9.6mm ±10% - ±100ppm/°C - - -
RS庫存編號 167-5319
製造零件編號PV36W203C01B00
BrandBourns
HK$20.229
毎管:50 個
單位
20 kΩ Through Hole 25 Top Adjust 0.5W PV36 Solder Pin 9.6mm ±10% - ±100ppm/°C - - -
RS庫存編號 461-7258
製造零件編號TC33X-2-104E
BrandBourns
HK$1.554
/個 (每包:50個)
單位
100 kΩ Surface Mount 1 Top Adjust 0.1W TC33 Solder Pad 3mm ±25% - ±250ppm/°C - - -