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 812-803
MarqueRS PRO
42,67 €
Each
Unité
500Ω Rotary 1 - Panel Mount 1.5W 6.35 mm Linear - Wirewound Solder Lug ±10% CLR4000 -
N° de stock RS 173-0773
MarqueRS PRO
64,698 €
Each (In a Box of 5)
Unité
10kΩ Linear - - - - 4 mm Linear - Conductive Plastic Solder Tab ±30% 149618 28mm
N° de stock RS 812-847
MarqueRS PRO
45,70 €
Each
Unité
5kΩ Rotary 1 4 Panel Mount 1.5W 6.35 mm Linear - Wirewound Solder Lug ±10% CLR4000 -
N° de stock RS 173-0747
MarqueRS PRO
4,138 €
Each (In a Box of 50)
Unité
1kΩ - 10 - Panel Mount 2W 6.35 mm - - Wirewound Solder ±10% NHP22 20.5mm
N° de stock RS 842-7062
MarqueRS PRO
5,17 €
Each
Unité
25Ω Rotary 1 1 Panel Mount 1W 6.35 mm Linear - Wirewound Solder ±10% P25 25mm
N° de stock RS 170-5318
MarqueRS PRO
26,054 €
Each (In a Box of 100)
Unité
5kΩ Linear 1 4 Panel Mount 1.5W 6.35 mm Linear - - Solder Lug ±10% CLR4000 -
N° de stock RS 173-0729
MarqueRS PRO
1,283 €
Each (In a Box of 50)
Unité
25Ω - 1 - Panel Mount 1W 6.35 mm - - Wirewound Solder ±10% P25 25mm
N° de stock RS 812-819
MarqueRS PRO
44,36 €
Each
Unité
1kΩ Rotary 1 4 Panel Mount 1.5W 6.35 mm Linear - Wirewound Solder Lug ±10% CLR4000 -
N° de stock RS 842-7188
MarqueRS PRO
77,57 €
Each
Unité
10kΩ Linear - 1 - - 4 mm Linear - Conductive Plastic Solder Tab ±30% 149618 28mm
N° de stock RS 173-0758
MarqueRS PRO
4,263 €
Each (In a Box of 50)
Unité
2kΩ - 1 - Panel Mount 1W 6.35 mm - - Wirewound Solder ±10% P25 25mm
N° de stock RS 173-0723
MarqueRS PRO
1,283 €
Each (In a Box of 50)
Unité
250Ω - 1 - Panel Mount 1W 6.35 mm - - Wirewound Solder ±10% P25 25mm
N° de stock RS 173-0777
MarqueRS PRO
82,198 €
Each (In a Box of 5)
Unité
5kΩ Linear - - Spring Return - - Linear - Conductive Plastic - ±20% WT22 -
N° de stock RS 842-7131
MarqueRS PRO
8,16 €
Each
Unité
1kΩ Rotary 10 1 Panel Mount 2W 6.35 mm Linear - Wirewound Solder ±10% NHP22 20.5mm
N° de stock RS 173-0728
MarqueRS PRO
1,283 €
Each (In a Box of 50)
Unité
10Ω - 1 - Panel Mount 1W 6 mm - - Wirewound Solder ±10% P25 25mm
N° de stock RS 173-0772
MarqueRS PRO
67,934 €
Each (In a Box of 5)
Unité
10kΩ Linear - - - - 4 mm Linear - Conductive Plastic Solder Tab ±30% 149618 28mm
N° de stock RS 842-7056
MarqueRS PRO
5,17 €
Each
Unité
10Ω Rotary 1 1 Panel Mount 1W 6 mm Linear - Wirewound Solder ±10% P25 25mm
N° de stock RS 842-7181
MarqueRS PRO
73,87 €
Each
Unité
10kΩ Linear - 1 - - 4 mm Linear - Conductive Plastic Solder Tab ±30% 149618 28mm
N° de stock RS 842-7191
MarqueRS PRO
151,41 €
Each
Unité
5kΩ Linear - 1 Spring Return - - Linear - Conductive Plastic - ±20% WT22 -
N° de stock RS 842-7087
MarqueRS PRO
5,17 €
Each
Unité
100Ω Rotary 1 1 Panel Mount 1W 6.35 mm Linear - Wirewound Solder ±10% P25 25mm
N° de stock RS 842-7084
MarqueRS PRO
5,17 €
Each
Unité
250Ω Rotary 1 1 Panel Mount 1W 6.35 mm Linear - Wirewound Solder ±10% P25 25mm