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 522-0079
製造零件編號3296Y-1-103LF
BrandBourns
HK$15.89
單位
10 kΩ Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS庫存編號 521-9710
製造零件編號3296W-1-203LF
BrandBourns
HK$15.75
單位
20 kΩ Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS庫存編號 169-3081
製造零件編號M64W503KB40
BrandVishay
HK$12.841
個 (以毎盒:200)
單位
50 kΩ Through Hole 19 (Electrical), 22 (Mechanical) Top Adjust 0.5W 64W Pin 9.7mm ±10% - - - - -
RS庫存編號 743-2372
製造零件編號3314J-1-105E
BrandBourns
HK$12.00
/個 (每包:5個)
單位
1 MΩ Surface Mount 1 Top Adjust 0.25W 3314 J-Hook 4.5mm ±20% - ±100ppm/°C - - -
RS庫存編號 167-3405
製造零件編號3296Y-1-103LF
BrandBourns
HK$13.709
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 743-2426
製造零件編號3362W-1-101LF
BrandBourns
HK$8.35
單位
100 Ω Through Hole 1 Side Adjust 0.5W 3362 Pin 6.6mm ±10% - ±100ppm/°C - - -
RS庫存編號 850-9634
製造零件編號T73XX104KT20
BrandVishay
HK$3.095
/個 (每包:1000個)
單位
100 kΩ Through Hole 1 Side Adjust 0.5W T73 PC Pin 6.6mm ±10% - ±100ppm/°C - - -
RS庫存編號 169-3118
製造零件編號M63M203KB40
BrandVishay
HK$15.63
個 (以毎盒:200)
單位
20 kΩ Through Hole 1 Top Adjust 0.5W 63M Pin 9.52mm ±10% - ±100ppm/°C - - -
RS庫存編號 168-0257
製造零件編號409VA103M
HK$3,413.31
毎卷:1000 個
Reel(s)
10 kΩ Through Hole 1 Side Adjust 0.5W 409 Pin 9mm ±20% - ±250ppm/°C - - -
RS庫存編號 763-7157
製造零件編號Y405310K0000J0L
HK$239.40
單位
10 kΩ Through Hole 21 Top Adjust 0.25W 1240 Solder Pin 6.35mm ±5% - ±10ppm/°C - - -
RS庫存編號 177-504
製造零件編號3224W-1-503E
BrandBourns
HK$33.90
/個 (每包:5個)
單位
50 kΩ Surface Mount 12 Top Adjust 0.25W 3224 J-Hook 4.8mm ±10% - ±100ppm/°C - - -
RS庫存編號 167-3470
製造零件編號3386P-1-103LF
BrandBourns
HK$6.25
毎管:50 個
單位
10 kΩ Through Hole 1 Top Adjust 0.5W 3386 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS庫存編號 162-631
製造零件編號M43P100KB40
BrandVishay
HK$8.00
單位
10 Ω Through Hole 20 Side Adjust 1/2W 43P Pin 20.57mm ±10% 4.83mm -100 → +200ppm/°C 6.35mm 20.57 x 4.83 x 6.35mm -
RS庫存編號 167-3402
製造零件編號3296Y-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 167-3388
製造零件編號3299W-1-103LF
BrandBourns
HK$15.906
毎管:50 個
單位
10 kΩ Through Hole 25 Top Adjust 0.5W 3299 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS庫存編號 521-9596
製造零件編號3296P-1-503LF
BrandBourns
HK$19.85
單位
50 kΩ Through Hole 25 Side Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS庫存編號 850-9704
製造零件編號T93YA100KT20
BrandVishay
HK$14.55
單位
10 Ω Through Hole 21 (Electrical), 23 (Mechanical) Top Adjust 0.5W T93 PC Pin 9.7mm ±10% - ±100ppm/°C - - -
RS庫存編號 769-2110
製造零件編號PV32H103A01B00
BrandBourns
HK$8.04
單位
10 kΩ Through Hole 1 Top Adjust 0.5W PV32 Solder Pin - ±20% - ±100ppm/°C - - -
RS庫存編號 896-7147
製造零件編號CT-6EV 100R
HK$8.232
個 (以毎袋:5)
單位
100 Ω Through Hole 1 Top Adjust 0.5W CT6 Solder Pin 7mm ±10% - ±100ppm/°C - - 7.07 V
RS庫存編號 474-6980
製造零件編號CT-6EP 5k Ohm
HK$8.252
/個 (每包:5個)
單位
5 kΩ Through Hole 1 Top Adjust 0.5W CT-6 Pin 7mm ±10% - ±100ppm/°C - - -