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. 167-0124
Fabrikantnummer6657S-1-103
FabrikantBourns
€ 25,81
Each (In a Tray of 25)
Aantal stuks
10kΩ Rotary Continuous 1 Bushing Mount 1.5W 6.35 mm Linear - Conductive Plastic Solder Turret ±10% 6657 12.7mm
RS-stocknr. 484-9231
Fabrikantnummer14920F0GJSX13102KA
FabrikantVishay
€ 18,49
Each
Aantal stuks
1kΩ Rotary 1 2 Panel Mount, Through Hole 1W 6.35 mm Linear - Cermet Pin ±10% 149 22.2mm
RS-stocknr. 167-9748
Fabrikantnummer14920F0GJSX13102KA
FabrikantVishay
€ 12,221
Each (In a Box of 60)
Aantal stuks
1kΩ Rotary 1 2 Panel Mount, Through Hole 1W 6.35 mm Linear - Cermet Pin ±10% 149 22.2mm
RS-stocknr. 249-9222
FabrikantnummerRK1631110TV7
FabrikantAlps Alpine
€ 3,00
Each
Aantal stuks
100kΩ Rotary 1 - Panel Mount, Through Hole 0.05W 6 mm Logarithmic - - Pin ±20% RK163 -
RS-stocknr. 851-7317
Fabrikantnummer6657S-1-103
FabrikantBourns
€ 32,11
Each
Aantal stuks
10kΩ Rotary Continuous 1 Bushing Mount 1.5W 6.35 mm Linear - Conductive Plastic Solder Turret ±10% 6657 12.7mm
RS-stocknr. 249-9250
FabrikantnummerRK1631110TV6
FabrikantAlps Alpine
€ 2,40
Each
Aantal stuks
50kΩ Rotary 1 - Panel Mount, Through Hole 0.1W 6 mm Linear - - Pin ±20% RK163 -
RS-stocknr. 167-8683
FabrikantnummerPE30L0FR103KAB
FabrikantVishay
€ 25,885
Each (In a Box of 10)
Aantal stuks
10kΩ Rotary 1 1 Panel Mount 3W 6 mm Linear - Cermet Solder Lug ±10% PE30 50mm
RS-stocknr. 167-3208
Fabrikantnummer3310Y-001-103L
FabrikantBourns
€ 1,875
Each (In a Tube of 50)
Aantal stuks
10kΩ Rotary 1 1 Panel Mount, Through Hole 0.25W 3.18 mm Linear - Conductive Plastic PC Pin ±20% 3310 12.7mm
RS-stocknr. 135-4478
Fabrikantnummer1623757-2
FabrikantTE Connectivity
€ 4,343
Each (In a Box of 200)
Aantal stuks
1kΩ Rotary 1 1 Panel Mount 0.4W 6.35 mm Linear - Carbon Solder Lug ±20% 23 50mm
RS-stocknr. 387-739
Fabrikantnummer1624139-2
FabrikantTE Connectivity
€ 4,55
Each
Aantal stuks
4.7kΩ Rotary 1 1 Panel Mount 0.4W 6.35 mm Linear - Carbon Solder Lug ±20% 23 50mm
RS-stocknr. 135-4480
Fabrikantnummer1624202-2
FabrikantTE Connectivity
€ 3,854
Each (In a Box of 100)
Aantal stuks
10kΩ Rotary 1 1 Panel Mount 0.4W 6.35 mm Linear - Carbon Solder Lug ±20% 23 50mm
RS-stocknr. 172-6336
FabrikantnummerRK09L112003P
FabrikantAlps Alpine
€ 1,107
Each (In a Tray of 100)
Aantal stuks
20kΩ Rotary 1 - Panel Mount, Through Hole 0.05W 6 mm Linear - - Pin ±20% RK09L -
RS-stocknr. 167-9473
Fabrikantnummer157S103MX
FabrikantVishay
€ 36,54
Each (In a Box of 10)
Aantal stuks
10kΩ Rotary 1 1 Servo Mount 1W 3.18 mm Linear - Conductive Plastic Turret ±20% 157 11.1mm
RS-stocknr. 135-4477
Fabrikantnummer1624139-2
FabrikantTE Connectivity
€ 2,467
Each (In a Box of 200)
Aantal stuks
4.7kΩ Rotary 1 1 Panel Mount 0.4W 6.35 mm Linear - Carbon Solder Lug ±20% 23 50mm
RS-stocknr. 172-6351
FabrikantnummerRK0971110702
FabrikantAlps Alpine
€ 1,119
Each (In a Tray of 80)
Aantal stuks
50kΩ Rotary 1 - Panel Mount, Through Hole 0.05W 6 mm Logarithmic - - Pin ±20% RK097 -
RS-stocknr. 729-3404
FabrikantnummerRK09L112003P
FabrikantAlps Alpine
€ 1,60
Each
Aantal stuks
20kΩ Rotary 1 1 Through Hole 0.05W 6 mm Linear - - Pin ±20% RK09L 15mm
RS-stocknr. 387-745
Fabrikantnummer1623757-2
FabrikantTE Connectivity
€ 5,49
Each
Aantal stuks
1kΩ Rotary 1 1 Panel Mount 0.4W 6.35 mm Linear - Carbon Solder Lug ±20% 23 50mm
RS-stocknr. 263-3270
FabrikantnummerRSA0N11S9002
FabrikantAlps Alpine
€ 5,93
Each
Aantal stuks
10kΩ Slide 1 - Through Hole 0.5W - Linear - - Pin ±20% RSA0N -
RS-stocknr. 249-9109
FabrikantnummerRK0971110702
FabrikantAlps Alpine
€ 1,66
Each
Aantal stuks
50kΩ Rotary 1 - Panel Mount, Through Hole 0.05W 6 mm Logarithmic - - Pin ±20% RK097 -
RS-stocknr. 827-5035
FabrikantnummerPTD901-2015K-B103
FabrikantBourns
€ 1,50
Each
Aantal stuks
10kΩ Rotary - 1 - 0.05W 6 mm Linear - Carbon PC Pin ±25% PTD90 15mm