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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Omschrijving Prijs Maximum Resistance Mounting Type Number of Turns Orientation Power Rating Series Termination Style Length Tolerance Depth Temperature Coefficient Height Dimensions Maximum Voltage Rating
RS-stocknr. 522-1016
Fabrikantnummer3362W-1-102LF
FabrikantBourns
€ 0,89
Each
Aantal stuks
1 kΩ Through Hole 1 Side Adjust 0.5W 3362 Pin 6.6mm ±10% - ±100ppm/°C - - -
RS-stocknr. 162-1633
FabrikantnummerCB10LV471M
FabrikantTE Connectivity
€ 215,60
1 Box of 1000
Box(es)
470 Ω Through Hole 1 Top Adjust 0.15W CB10 Pin 11mm ±20% - ±500ppm/°C - - -
RS-stocknr. 167-5321
FabrikantnummerPV36W202C01B00
FabrikantBourns
€ 1,626
Each (In a Tube of 50)
Aantal stuks
2 kΩ Through Hole 25 Top Adjust 0.5W PV36 Solder Pin 9.6mm ±10% - ±100ppm/°C - - -
RS-stocknr. 731-2883
FabrikantnummerEVM3YSX50B14
FabrikantPanasonic
€ 0,388
Each (In a Pack of 5)
Aantal stuks
10 kΩ Surface Mount 1 Top Adjust 0.15W EVM3Y Solder Pad 3.1mm ±25% - ±250ppm/°C - - -
RS-stocknr. 167-3232
Fabrikantnummer3386X-1-103LF
FabrikantBourns
€ 1,404
Each (In a Tube of 50)
Aantal stuks
10 kΩ Through Hole 1 Side Adjust 0.5W 3386 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS-stocknr. 161-7185
Fabrikantnummer3386H-1-505LF
FabrikantBourns
€ 0,794
Each (In a Tube of 50)
Aantal stuks
5 MΩ Through Hole 1 Side Adjust 0.5W 3386 Solder Pin 9.53mm ±10% - ±100ppm/°C - - -
RS-stocknr. 785-9745
Fabrikantnummer3296W-1-302LF
FabrikantBourns
€ 1,36
Each
Aantal stuks
3 kΩ Through Hole 25 Top Adjust 0.5W 3296 Solder Pin 9.53mm ±10% - ±100ppm/°C - - -
RS-stocknr. 785-9821
Fabrikantnummer3296Z-1-200LF
FabrikantBourns
€ 2,08
Each
Aantal stuks
20 Ω Through Hole 25 Side Adjust 0.5W 3296 Solder Pin 9.53mm ±10% - ±100ppm/°C - - -
RS-stocknr. 167-3380
Fabrikantnummer3296X-1-101LF
FabrikantBourns
€ 1,373
Each (In a Tube of 50)
Aantal stuks
100 Ω Through Hole 25 Side Adjust 0.5W 3296 Pin 11.05mm ±10% - ±100ppm/°C - - -
RS-stocknr. 796-4853
Fabrikantnummer3299W-1-205LF
FabrikantBourns
€ 2,93
Each
Aantal stuks
2 MΩ Through Hole 25 Top Adjust 0.5W 3299 Solder Pin 10.03mm ±10% - ±100ppm/°C - - -
RS-stocknr. 521-9338
Fabrikantnummer3266X-1-103LF
FabrikantBourns
€ 3,64
Each
Aantal stuks
10 kΩ Through Hole 12 Side Adjust 0.25W 3266 Pin 7.73mm ±10% - ±100ppm/°C - - -
RS-stocknr. 522-0063
Fabrikantnummer3296Y-1-102LF
FabrikantBourns
€ 1,99
Each
Aantal stuks
1 kΩ Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS-stocknr. 169-3104
FabrikantnummerM64Y103KB40
FabrikantVishay
€ 1,383
Each (In a Box of 200)
Aantal stuks
10 kΩ Through Hole 19 (Electrical), 22 (Mechanical) Top Adjust 0.5W 64Y Pin 9.7mm ±10% - ±100ppm/°C - - -
RS-stocknr. 486-7302
FabrikantnummerTSM4YJ204KB25
FabrikantVishay
€ 2,88
Each (In a Pack of 5)
Aantal stuks
200 kΩ Surface Mount 11 Side Adjust 0.2W TSM4 J-Hook 4.8mm ±10% - ±100ppm/°C - - -
RS-stocknr. 521-9041
Fabrikantnummer3006P-1-103LF
FabrikantBourns
€ 1,67
Each
Aantal stuks
10 kΩ Through Hole 15 Side Adjust 0.75W 3006 Pin 20.57mm ±10% - ±100ppm/°C - - -
RS-stocknr. 785-9711
Fabrikantnummer3386H-1-505LF
FabrikantBourns
€ 1,14
Each
Aantal stuks
5 MΩ Through Hole 1 Side Adjust 0.5W 3386 Solder Pin 9.53mm ±10% - ±100ppm/°C - - -
RS-stocknr. 240-1540
Fabrikantnummer3214W-1-202E
FabrikantBourns
€ 2,134
Each (In a Pack of 5)
Aantal stuks
2 kΩ Surface Mount 5 Top Adjust 0.25W 3214 J-Hook 4.8mm ±10% - ±100ppm/°C - - -
RS-stocknr. 167-3392
Fabrikantnummer3296W-1-253LF
FabrikantBourns
€ 1,362
Each (In a Tube of 50)
Aantal stuks
25 kΩ Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
RS-stocknr. 738-036
Fabrikantnummer3224G-1-103E
FabrikantBourns
€ 4,00
Each
Aantal stuks
10 kΩ Surface Mount 12 Side Adjust 0.25W 3224 Gull Wing 4.8mm ±10% - ±100ppm/°C - - -
RS-stocknr. 167-3404
Fabrikantnummer3296Y-1-102LF
FabrikantBourns
€ 1,581
Each (In a Tube of 50)
Aantal stuks
1 kΩ Through Hole 25 Top Adjust 0.5W 3296 Pin 9.53mm ±10% - ±100ppm/°C - - -
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