Potentiometers

What is a potentiometer?



A potentiometer is a variable resistor. Potentiometers enable you to regulate and change the current flowing through a circuit. Potentiometers can also be called pots or potmeters.



Potentiometers have two terminals that are fixed to a resistive element (the track). The resistive element is typically wirewound or made from carbon, cermet or conductive plastic. The third terminal is connected to the wiper, which is a sliding contact. As the wiper moves along the track, the resistance changes and the current flowing through the circuit changes.



Types of potentiometer



Rotary potentiometers are easily controlled by turning a spindle or a knob. Rotary potentiometers can be single turn or multiturn.



Slide potentiometers are also known as slider potentiometers or fader potentiometers. To use a slide potentiometer, it’s simply a case of sliding a fader along a straight track to change the resistance.



Trimmer potentiometers, sometimes called trimpots, are used to calibrate and fine-tune circuits and can be mounted straight onto a PCB (printed circuit board). Trimmer potentiometers are easy to adjust with a screwdriver.



String potentiometers (or string pots) take movement and transform it into an electrical signal.



Membrane potentiometers are completely flat. Membrane potentiometers change their resistance when pressure is applied to the membrane.



Do I need a potentiometer with a linear or logarithmic taper?



The taper you need for your potentiometer depends on the intended application.



For potentiometers with a linear taper, the resistance between one end of the track and the wiper varies at a constant rate. If you turn the potentiometer halfway or slide the fader halfway along the track, the resistance will be half of the total resistance. Linear taper potentiometers are typically used in applications such as light dimmer switches.



For logarithmic taper potentiometers, the resistance does not vary at a constant rate. The level of resistance moves exponentially up or down. A potentiometer that has been turned or moved halfway along its track, will not produce resistance that is half the total resistance. Logarithmic potentiometers are commonly used for audio applications.



What is the difference between a potentiometer and a rheostat?



The key difference is the number of terminals that each device has. Potentiometers have three terminals while rheostats only have two terminals.



Looking for peripherals for your potentiometer?



Potentiometer Knobs

Potentiometer Accessories

Potentiometer Mounting Nuts

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Description Prix Maximum Resistance Potentiometer Type Number of Turns Number of Gangs Mounting Type Power Rating Shaft Diameter Electrical Taper Mounting Hole Diameter Element Material Termination Style Tolerance Series Shaft Length
N° de stock RS 172-6361
Référence fabricantRK1631110TWA
MarqueAlps Alpine
1,169 €
Each (In a Box of 2400)
Unité
10kΩ Rotary 1 - Panel Mount, Through Hole 0.1W 6 mm Linear - - Pin ±10% RK163 -
N° de stock RS 249-9238
Référence fabricantRK1631110TWA
MarqueAlps Alpine
1,69 €
Each
Unité
10kΩ Rotary 1 - Panel Mount, Through Hole 0.1W 6 mm Linear - - Pin ±10% RK163 -
N° de stock RS 263-3270
Référence fabricantRSA0N11S9002
MarqueAlps Alpine
5,93 €
Each
Unité
10kΩ Slide 1 - Through Hole 0.5W - Linear - - Pin ±20% RSA0N -
N° de stock RS 172-6396
Référence fabricantRSA0N11S9002
MarqueAlps Alpine
2,674 €
Each (In a Tray of 40)
Unité
10kΩ Slide 1 - Through Hole 0.5W - Linear - - Pin ±20% RSA0N -
N° de stock RS 249-9266
Référence fabricantRK1631110TVG
MarqueAlps Alpine
1,22 €
Each
Unité
100kΩ Rotary 1 - Panel Mount, Through Hole 0.1W 6 mm Linear - - Pin ±20% RK163 -
N° de stock RS 729-3420
Référence fabricantRK09L1140A65
MarqueAlps Alpine
1,65 €
Each
Unité
5kΩ Rotary 1 1 Through Hole 0.05W 6 mm Linear - - Pin ±20% RK09L 25mm
N° de stock RS 172-7625
Référence fabricantRK09L1140A65
MarqueAlps Alpine
1,322 €
Each (In a Tray of 100)
Unité
5kΩ Rotary 1 - Panel Mount, Through Hole 0.05W 6 mm Linear - - Pin ±20% RK09L -
N° de stock RS 729-3656
Référence fabricantRK09D1130C3W
MarqueAlps Alpine
0,67 €
Each
Unité
10kΩ Rotary 1 1 Through Hole 0.05W 6 mm Linear - - Pin ±20% RK09D 20mm
N° de stock RS 172-7572
Référence fabricantRK09D1130C3W
MarqueAlps Alpine
0,568 €
Each (In a Box of 1000)
Unité
10kΩ Rotary 1 - Through Hole 0.05W 6 mm Linear - - Pin ±20% RK09D -
N° de stock RS 249-9250
Référence fabricantRK1631110TV6
MarqueAlps Alpine
2,40 €
Each
Unité
50kΩ Rotary 1 - Panel Mount, Through Hole 0.1W 6 mm Linear - - Pin ±20% RK163 -
N° de stock RS 172-7660
Référence fabricantRK09712200JC
MarqueAlps Alpine
1,452 €
Each (In a Tray of 80)
Unité
50kΩ Rotary 1 - Panel Mount, Through Hole 0.05W 6 mm Logarithmic - - Pin ±20% RK097 -
N° de stock RS 172-7656
Référence fabricantRK1631110TV6
MarqueAlps Alpine
1,184 €
Each (In a Box of 1000)
Unité
50kΩ Rotary 1 - Panel Mount, Through Hole 0.1W 6 mm Linear - - Pin ±20% RK163 -
N° de stock RS 249-9165
Référence fabricantRK09712200JC
MarqueAlps Alpine
4,66 €
Each
Unité
50kΩ Rotary 1 - Panel Mount, Through Hole 0.05W 6 mm Logarithmic - - Pin ±20% RK097 -
N° de stock RS 729-3619
Référence fabricantRK09K1130AV7
MarqueAlps Alpine
0,61 €
Each
Unité
5kΩ Rotary 1 1 Through Hole 0.05W 6 mm Linear - - Pin ±20% RK09K 20mm
N° de stock RS 172-7540
Référence fabricantRK09K1130AV7
MarqueAlps Alpine
0,50 €
Each (In a Box of 1000)
Unité
5kΩ Rotary 1 - Through Hole 0.05W 6 mm Linear - - Pin ±20% RK09K -
N° de stock RS 249-9294
Référence fabricantRK1631210AY7
MarqueAlps Alpine
5,66 €
Each
Unité
10kΩ Rotary 1 - Panel Mount, Through Hole 0.1W 6 mm Linear - - Pin ±20% RK163 -
N° de stock RS 172-8116
Référence fabricantRK1631210AY7
MarqueAlps Alpine
1,55 €
Each (In a Box of 2400)
Unité
10kΩ Rotary 1 - Panel Mount, Through Hole 0.1W 6 mm Linear - - Pin ±20% RK163 -
N° de stock RS 729-3482
Référence fabricantRK0971110D57
MarqueAlps Alpine
1,90 €
Each
Unité
10kΩ Rotary 1 1 Through Hole 0.05W 6 mm - - - Pin ±20% RK097 25mm
N° de stock RS 172-6359
Référence fabricantRK0971110D57
MarqueAlps Alpine
1,617 €
Each (In a Tray of 80)
Unité
10kΩ Rotary 1 - Panel Mount, Through Hole 0.05W 6 mm Linear - - Pin ±20% RK097 -
N° de stock RS 172-8095
Référence fabricantRK1631110TV7
MarqueAlps Alpine
0,962 €
Each (In a Box of 1000)
Unité
100kΩ Rotary 1 - Panel Mount, Through Hole 0.05W 6 mm Logarithmic - - Pin ±20% RK163 -