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

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Omschrijving Prijs 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
RS-stocknr. 317-780
FabrikantRS PRO
€ 32,14
Each
Aantal stuks
5kΩ - 1 - Panel Mount - 3 mm Linear - Conductive Plastic Wire Lead ±20% LM10 -
RS-stocknr. 842-7002
FabrikantRS PRO
€ 5,20
Each
Aantal stuks
10kΩ Rotary 1 1 Panel Mount 1W 6.35 mm Linear - Wirewound Solder ±10% P25 25mm
RS-stocknr. 173-0726
FabrikantRS PRO
€ 1,283
Each (In a Box of 50)
Aantal stuks
2.5kΩ - 1 - Panel Mount 1W 6 mm - - Wirewound Solder ±10% P25 25mm
RS-stocknr. 842-7018
FabrikantRS PRO
€ 5,17
Each
Aantal stuks
2.5kΩ Rotary 1 1 Panel Mount 1W 6 mm Linear - Wirewound Solder ±10% P25 25mm
RS-stocknr. 170-5321
FabrikantRS PRO
€ 26,054
Each (In a Box of 100)
Aantal stuks
50kΩ Linear 1 4 Panel Mount 1.5W 6.35 mm Linear - - Solder Lug ±10% CLR4000 -
RS-stocknr. 812-881
FabrikantRS PRO
€ 40,99
Each
Aantal stuks
50kΩ Rotary 1 4 Panel Mount 1.5W 6.35 mm Linear - Wirewound Solder Lug ±10% CLR4000 -
RS-stocknr. 173-0714
FabrikantRS PRO
€ 1,219
Each (In a Box of 50)
Aantal stuks
1kΩ - 1 - Panel Mount 1W 6.35 mm - - Wirewound Solder ±10% P25 25mm
RS-stocknr. 173-0758
FabrikantRS PRO
€ 4,263
Each (In a Box of 50)
Aantal stuks
2kΩ - 1 - Panel Mount 1W 6.35 mm - - Wirewound Solder ±10% P25 25mm
RS-stocknr. 842-7169
FabrikantRS PRO
€ 7,09
Each
Aantal stuks
5kΩ Rotary - 1 Panel Mount 2W 8 mm Linear - Conductive Plastic Solder ±20% NP32HS -
RS-stocknr. 173-0752
FabrikantRS PRO
€ 4,033
Each (In a Box of 50)
Aantal stuks
5kΩ Rotary - - Panel Mount 2W 8 mm - - Conductive Plastic Solder ±20% NP32HS -
RS-stocknr. 812-847
FabrikantRS PRO
€ 45,70
Each
Aantal stuks
5kΩ Rotary 1 4 Panel Mount 1.5W 6.35 mm Linear - Wirewound Solder Lug ±10% CLR4000 -
RS-stocknr. 842-7030
FabrikantRS PRO
€ 5,20
Each
Aantal stuks
1kΩ Rotary 1 1 Panel Mount 1W 6.35 mm Linear - Wirewound Solder ±10% P25 25mm
RS-stocknr. 173-0747
FabrikantRS PRO
€ 4,138
Each (In a Box of 50)
Aantal stuks
1kΩ - 10 - Panel Mount 2W 6.35 mm - - Wirewound Solder ±10% NHP22 20.5mm
RS-stocknr. 170-5318
FabrikantRS PRO
€ 26,054
Each (In a Box of 100)
Aantal stuks
5kΩ Linear 1 4 Panel Mount 1.5W 6.35 mm Linear - - Solder Lug ±10% CLR4000 -
RS-stocknr. 842-7131
FabrikantRS PRO
€ 8,16
Each
Aantal stuks
1kΩ Rotary 10 1 Panel Mount 2W 6.35 mm Linear - Wirewound Solder ±10% NHP22 20.5mm
RS-stocknr. 842-7107
FabrikantRS PRO
€ 7,93
Each
Aantal stuks
2kΩ Rotary 1 1 Panel Mount 1W 6.35 mm Linear - Wirewound Solder ±10% P25 25mm
RS-stocknr. 173-0773
FabrikantRS PRO
€ 64,698
Each (In a Box of 5)
Aantal stuks
10kΩ Linear - - - - 4 mm Linear - Conductive Plastic Solder Tab ±30% 149618 28mm
RS-stocknr. 842-7181
FabrikantRS PRO
€ 73,87
Each
Aantal stuks
10kΩ Linear - 1 - - 4 mm Linear - Conductive Plastic Solder Tab ±30% 149618 28mm
RS-stocknr. 842-7078
FabrikantRS PRO
€ 4,56
Each
Aantal stuks
100Ω Rotary 1 1 Panel Mount 1W 6 mm Linear - Wirewound Solder ±10% P25 25mm
RS-stocknr. 173-0725
FabrikantRS PRO
€ 1,283
Each (In a Box of 50)
Aantal stuks
100Ω - 1 - Panel Mount 1W 6 mm - - Wirewound Solder ±10% P25 25mm
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