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 729-9667
製造零件編號EVM2WSX80B14
BrandPanasonic
TWD15.80
/個 (每包:5個)
單位
10 kΩ Surface Mount 1 Top Adjust 0.15W EVM2W Solder Pad 2.2mm ±25% - ±250ppm/°C - - -
RS庫存編號 106-7950
製造零件編號EVM3YSX50B55
BrandPanasonic
TWD4.50
個 (在毎卷:2000)
單位
500 kΩ Surface Mount 1 Top Adjust 0.15W EVM3Y Solder Pad 3.1mm ±25% - ±250ppm/°C - - -
RS庫存編號 731-2896
製造零件編號EVM3YSX50B55
BrandPanasonic
TWD18.20
/個 (每包:5個)
單位
500 kΩ Surface Mount 1 Top Adjust 0.15W EVM3Y Solder Pad 3.1mm ±25% - ±250ppm/°C - - -
RS庫存編號 161-7042
製造零件編號3329H-1-302LF
BrandBourns
TWD79.00
毎管:50 個
單位
3 kΩ Through Hole 1 Top Adjust 0.5W 3329 Solder Pin - ±10% - ±100ppm/°C - - -
RS庫存編號 166-9933
製造零件編號3224G-1-501E
BrandBourns
TWD91.20
個 (在毎卷:500)
單位
500 Ω Surface Mount 12 Side Adjust 0.25W 3224 Gull Wing 4.8mm ±10% - ±100ppm/°C - - -
RS庫存編號 186-031
製造零件編號M70Y202KB25
BrandVishay
TWD2,220.00
單位
2 kΩ Through Hole 20 Side Adjust 0.5W 70Y Pin 33.53mm ±10% - ±100ppm/°C - - -
RS庫存編號 521-9653
製造零件編號3296W-1-104LF
BrandBourns
TWD111.00
單位
100 kΩ Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS庫存編號 691-2577
製造零件編號3269W-1-202LF
BrandBourns
TWD164.00
單位
2 kΩ Surface Mount 12 Top Adjust 0.25W 3269 Gull Wing 6.35mm ±10% - ±100ppm/°C - - -
RS庫存編號 850-9625
製造零件編號T73XX103KT20
BrandVishay
TWD33.00
單位
10 kΩ Through Hole 1 Side Adjust 0.5W T73 PC Pin 6.6mm ±10% - ±100ppm/°C - - -
RS庫存編號 169-3111
製造零件編號M43P205KB40
BrandVishay
TWD54.60
個 (以毎盒:200)
單位
2 MΩ Through Hole 20 Side Adjust 0.5W 43P Pin 20.57mm ±10% - ±100ppm/°C - - -
RS庫存編號 167-4569
製造零件編號3269W-1-202LF
BrandBourns
TWD125.50
毎管:50 個
單位
2 kΩ Surface Mount 12 Top Adjust 0.25W 3269 Gull Wing 6.35mm ±10% - ±100ppm/°C - - -
RS庫存編號 167-3544
製造零件編號3214W-1-502E
BrandBourns
TWD71.90
個 (在毎卷:250)
單位
5 kΩ Surface Mount 5 Top Adjust 0.25W 3214 J-Hook 4.8mm ±10% - ±100ppm/°C - - -
RS庫存編號 796-4778
製造零件編號3224G-1-501E
BrandBourns
TWD167.00
單位
500 Ω Surface Mount 12 Side Adjust 0.25W 3224 Gull Wing 4.8mm ±10% - ±100ppm/°C - - -
RS庫存編號 521-9186
製造零件編號3266W-1-102LF
BrandBourns
TWD147.00
單位
1 kΩ Through Hole 12 Top Adjust 0.25W 3266 Pin 6.71mm ±10% - ±100ppm/°C - - -
RS庫存編號 167-3480
製造零件編號3386P-1-504LF
BrandBourns
TWD41.70
毎管:50 個
單位
500 kΩ Through Hole 1 Top Adjust 0.5W 3386 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS庫存編號 177-504
製造零件編號3224W-1-503E
BrandBourns
TWD170.00
/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 522-2801
製造零件編號3386P-1-504LF
BrandBourns
TWD54.00
單位
500 kΩ Through Hole 1 Top Adjust 0.5W 3386 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS庫存編號 787-0566
製造零件編號3362P-1-302LF
BrandBourns
TWD35.00
單位
3 kΩ Through Hole 1 Top Adjust 0.5W 3362 Pin 6.6mm ±10% - ±100ppm/°C - - -
RS庫存編號 522-0063
製造零件編號3296Y-1-102LF
BrandBourns
TWD97.00
單位
1 kΩ Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS庫存編號 521-9287
製造零件編號3266W-1-502LF
BrandBourns
TWD141.00
單位
5 kΩ Through Hole 12 Top Adjust 0.25W 3266 Pin 6.71mm ±10% - ±100ppm/°C - - -