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 522-0136
製造零件編號3296Y-1-202LF
BrandBourns
HK$15.33
單位
2 kΩ Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS庫存編號 167-9940
製造零件編號T93XA102KT20
BrandVishay
HK$8.20
毎管:50 個
單位
1 kΩ Through Hole 21 Side Adjust 0.5W T93 Pin 9.7mm ±10% - ±100ppm/°C - - -
RS庫存編號 521-9091
製造零件編號3006P-1-203LF
BrandBourns
HK$8.09
單位
20 kΩ Through Hole 15 Side Adjust 0.75W 3006 Pin 20.57mm ±10% - ±100ppm/°C - - -
RS庫存編號 183-1350
製造零件編號M63M203KB40
BrandVishay
HK$19.67
單位
20 kΩ Through Hole 1 Top Adjust 0.5W 63M Pin 9.52mm ±10% - ±100ppm/°C - - -
RS庫存編號 167-5238
製造零件編號3362W-1-101LF
BrandBourns
HK$6.56
毎管:50 個
單位
100 Ω Through Hole 1 Side Adjust 0.5W 3362 Pin 6.6mm ±10% - ±100ppm/°C - - -
RS庫存編號 374-6923
製造零件編號T7YB103MT20
BrandVishay
HK$8.95
/個 (每包:5個)
單位
10 kΩ Through Hole 1 Top Adjust 0.5W T7 Pin - ±10% - ±100ppm/°C - - -
RS庫存編號 167-5452
製造零件編號3314J-1-105E
BrandBourns
HK$9.014
個 (在毎卷:500)
單位
1 MΩ Surface Mount 1 Top Adjust 0.25W 3314 J-Hook 4.5mm ±20% - ±100ppm/°C - - -
RS庫存編號 154-2066
製造零件編號M64W503KB40
BrandVishay
HK$18.78
單位
50 kΩ Through Hole 19 (Electrical), 22 (Mechanical) Top Adjust 1/2W 64W Pin 9.7mm ±10% 5mm - 11.1mm 9.7 x 5 x 11.1mm -
RS庫存編號 167-3378
製造零件編號3296W-1-104LF
BrandBourns
HK$13.709
毎管:50 個
單位
100 kΩ Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS庫存編號 161-6992
製造零件編號3296Y-1-222LF
BrandBourns
HK$7.486
毎管:50 個
單位
2.2 kΩ Through Hole 25 Top Adjust 0.5W 3296 Solder Pin 9.53mm ±10% - ±100ppm/°C - - -
RS庫存編號 167-3251
製造零件編號3362P-1-101LF
BrandBourns
HK$6.56
毎管:50 個
單位
100 Ω Through Hole 1 Top Adjust 0.5W 3362 Pin 6.6mm ±10% - ±100ppm/°C - - -
RS庫存編號 602-4428
製造零件編號SM-3W 100 Ohm
HK$17.278
/個 (每包:5個)
單位
100 Ω Surface Mount 11 Top Adjust 0.125W SM-3 J-Hook 3.9mm ±20% - ±100ppm/°C - - -
RS庫存編號 167-3240
製造零件編號3006P-1-203LF
BrandBourns
HK$10.892
毎管:25 個
單位
20 kΩ Through Hole 15 Side Adjust 0.75W 3006 Pin 20.57mm ±10% - ±100ppm/°C - - -
RS庫存編號 788-5025
製造零件編號T93XA102KT20
BrandVishay
HK$12.10
/個 (每包:5個)
單位
1 kΩ Through Hole 21 Side Adjust 0.5W T93 Pin 9.7mm ±10% - ±100ppm/°C - - -
RS庫存編號 167-3501
製造零件編號3296W-1-501LF
BrandBourns
HK$13.709
毎管:50 個
單位
500 Ω Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS庫存編號 521-9619
製造零件編號3296W-1-100LF
BrandBourns
HK$15.33
單位
10 Ω Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS庫存編號 167-5321
製造零件編號PV36W202C01B00
BrandBourns
HK$9.751
毎管:50 個
單位
2 kΩ Through Hole 25 Top Adjust 0.5W PV36 Solder Pin 9.6mm ±10% - ±100ppm/°C - - -
RS庫存編號 521-9782
製造零件編號3296W-1-501LF
BrandBourns
HK$18.76
單位
500 Ω Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS庫存編號 522-0877
製造零件編號3362P-1-101LF
BrandBourns
HK$6.32
單位
100 Ω Through Hole 1 Top Adjust 0.5W 3362 Pin 6.6mm ±10% - ±100ppm/°C - - -
RS庫存編號 769-2176
製造零件編號PV36W202C01B00
BrandBourns
HK$12.17
單位
2 kΩ Through Hole 25 Top Adjust 0.5W PV36 Solder Pin 9.6mm ±10% - ±100ppm/°C - - -