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 602-4428
製造零件編號SM-3W 100 Ohm
HK$44.276
/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 167-3405
製造零件編號3296Y-1-103LF
BrandBourns
HK$15.66
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 167-9940
製造零件編號T93XA102KT20
BrandVishay
HK$11.467
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 522-0350
製造零件編號3299W-1-203LF
BrandBourns
HK$27.56
單位
20 kΩ Through Hole 25 Top Adjust 0.5W 3299 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS庫存編號 167-3553
製造零件編號3266W-1-101LF
BrandBourns
HK$26.18
毎管:50 個
單位
100 Ω Through Hole 12 Top Adjust 0.25W 3266 Pin 6.71mm ±10% - ±100ppm/°C - - -
RS庫存編號 521-9782
製造零件編號3296W-1-501LF
BrandBourns
HK$15.36
單位
500 Ω Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS庫存編號 521-9164
製造零件編號3266W-1-101LF
BrandBourns
HK$36.67
單位
100 Ω Through Hole 12 Top Adjust 0.25W 3266 Pin 6.71mm ±10% - ±100ppm/°C - - -
RS庫存編號 521-9079
製造零件編號3006P-1-201LF
BrandBourns
HK$17.80
單位
200 Ω Through Hole 15 Side Adjust 0.75W 3006 Pin 20.57mm ±10% - ±100ppm/°C - - -
RS庫存編號 167-3383
製造零件編號3296W-1-201LF
BrandBourns
HK$14.792
毎管:50 個
單位
200 Ω Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS庫存編號 168-0369
製造零件編號416PA101M
HK$3.34
個 (在毎卷:1000)
單位
100 Ω Through Hole 1 Top Adjust 0.2W 416 Pin 6.8mm ±20% - ±250ppm/°C - - -
RS庫存編號 169-3077
製造零件編號M64W202KB40
BrandVishay
HK$16.43
個 (以毎盒:200)
單位
2 kΩ Through Hole 19 (Electrical), 22 (Mechanical) Top Adjust 0.5W 64W Pin 9.7mm ±10% - - - - -
RS庫存編號 167-5203
製造零件編號3006P-7-103LF
BrandBourns
HK$13.49
毎管:25 個
單位
10 kΩ Through Hole 15 Side Adjust 0.75W 3006 Pin 19.05mm ±10% - ±100ppm/°C - - -
RS庫存編號 474-7551
製造零件編號CT-94EW 2k Ohm
HK$30.92
單位
2 kΩ Through Hole 18 Top Adjust 0.5W CT-94 Pin 9.6mm ±10% - ±100ppm/°C - - -
RS庫存編號 167-4565
製造零件編號3269P-1-103LF
BrandBourns
HK$31.66
毎管:50 個
單位
10 kΩ Surface Mount 12 Side Adjust 0.25W 3269 Gull Wing 6.35mm ±10% - ±100ppm/°C - - -
RS庫存編號 850-9693
製造零件編號T7YB103KT20
BrandVishay
HK$28.24
單位
10 kΩ Through Hole - Top Adjust 0.5W T7 PC Pin - ±10% - ±100ppm/°C - - -
RS庫存編號 726-3813
製造零件編號EVM1DSX30B15
BrandPanasonic
HK$3.524
/個 (每包:5個)
單位
100 kΩ Surface Mount 1 Top Adjust 0.2W EVM1D Solder Pad 3.8mm ±25% - ±250ppm/°C - - -
RS庫存編號 169-3102
製造零件編號M64Y202KB40
BrandVishay
HK$13.26
個 (以毎盒:200)
單位
2 kΩ Through Hole 21 (Electrical), 23 (Mechanical) Top Adjust 0.5W 64Y Pin 9.7mm ±10% - ±100ppm/°C - - -
RS庫存編號 166-9612
製造零件編號SV01A103AEA01R00
BrandMurata
HK$7.619
個 (在毎卷:1000)
單位
10 kΩ Surface Mount - Top Adjust - SV01 Gull Wing 11mm ±30% - ±500ppm/°C - - -
RS庫存編號 522-0811
製造零件編號3329H-1-504LF
BrandBourns
HK$26.87
單位
500 kΩ Through Hole 1 Top Adjust 0.5W 3329 Pin - ±10% - ±100ppm/°C - - -
RS庫存編號 167-3494
製造零件編號3296P-1-503LF
BrandBourns
HK$14.877
毎管:50 個
單位
50 kΩ Through Hole 25 Side Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -