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 521-9631
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 169-3078
製造零件編號M64W502KB40
BrandVishay
HK$12.841
個 (以毎盒:200)
單位
5 kΩ Through Hole 19 (Electrical), 22 (Mechanical) Top Adjust 0.5W 64W Pin 9.7mm ±10% - - - - -
RS庫存編號 850-9643
製造零件編號T73YE103KT20
BrandVishay
HK$6.72
單位
10 kΩ Through Hole 1 Top Adjust 0.5W T73 PC Pin 6.6mm ±10% - ±100ppm/°C - - -
RS庫存編號 167-3411
製造零件編號3299W-1-202LF
BrandBourns
HK$15.906
毎管:50 個
單位
2 kΩ Through Hole 25 Top Adjust 0.5W 3299 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS庫存編號 162-2466
製造零件編號T7YB102MT20
BrandVishay
HK$5.32
毎管:50 個
單位
1 kΩ Through Hole 1 Top Adjust 0.5W T7 Pin - ±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 154-2044
製造零件編號M64W502KB40
BrandVishay
HK$15.90
單位
5 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 374-6894
製造零件編號T7YB102MT20
BrandVishay
HK$17.368
/個 (每包:5個)
單位
1 kΩ Through Hole 1 Top Adjust 0.5W T7 Pin - ±10% - ±100ppm/°C - - -
RS庫存編號 183-1209
製造零件編號M63M202KB30T607
BrandVishay
HK$29.78
單位
2 kΩ Through Hole 1 Finger Adjust 1/2W 63M-T607 Pin 9.52mm ±10% 9.52mm ±100ppm/°C 10.41mm 9.52 x 9.52 x 10.41mm -
RS庫存編號 154-2016
製造零件編號M64W501KB40
BrandVishay
HK$19.51
單位
500 Ω 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 521-9704
製造零件編號3296W-1-202LF
BrandBourns
HK$15.84
單位
2 kΩ Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS庫存編號 474-9305
製造零件編號RJ-13PR 10k Ohm (103)
HK$40.04
單位
10 kΩ Through Hole 1 - 0.75W - Pin - ±10% - ±100ppm/°C - - -
RS庫存編號 167-3454
製造零件編號3386F-1-202TLF
BrandBourns
HK$15.77
毎管:50 個
單位
2 kΩ Through Hole 1 Top Adjust 0.5W 3386 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS庫存編號 522-0344
製造零件編號3299W-1-202LF
BrandBourns
HK$24.16
單位
2 kΩ Through Hole 25 Top Adjust 0.5W 3299 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS庫存編號 522-2328
製造零件編號3386F-1-202TLF
BrandBourns
HK$20.86
單位
2 kΩ Through Hole 1 Top Adjust 0.5W 3386 Pin 9.53mm ±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 521-9287
製造零件編號3266W-1-502LF
BrandBourns
HK$24.45
單位
5 kΩ Through Hole 12 Top Adjust 0.25W 3266 Pin 6.71mm ±10% - ±100ppm/°C - - -
RS庫存編號 167-3357
製造零件編號3266W-1-502LF
BrandBourns
HK$21.982
毎管:50 個
單位
5 kΩ Through Hole 12 Top Adjust 0.25W 3266 Pin 6.71mm ±10% - ±100ppm/°C - - -
RS庫存編號 169-3075
製造零件編號M64W501KB40
BrandVishay
HK$12.841
個 (以毎盒:200)
單位
500 Ω Through Hole 19 (Electrical), 22 (Mechanical) Top Adjust 0.5W 64W Pin 9.7mm ±10% - - - - -
RS庫存編號 167-9660
製造零件編號M63M202KB30T607
BrandVishay
HK$16.12
個 (以毎盒:400)
單位
2 kΩ Through Hole 1 Top Adjust 0.5W 63M Pin 9.52mm ±10% - ±100ppm/°C - - -