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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Beskrivning Pris 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-artikelnummer 167-8683
Tillv. art.nrPE30L0FR103KAB
VarumärkeVishay
282,21 kr
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10 kΩ Rotary 1 1 Panel Mount 3W 6 mm Linear - Cermet Solder Lug ±10% PE30 50mm
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Tillv. art.nrP16NP104MAB15
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119,065 kr
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100 kΩ Rotary 1 1 Panel Mount 1W 16 mm Linear - Cermet Solder Lug ±20% P16 8.8mm
RS-artikelnummer 460-1922
Tillv. art.nr535B1103JC
VarumärkeVishay
216,11 kr
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10 kΩ Linear 5 - Panel Mount 1.5W 6.35 mm - - - Solder Lug ±5% 535 -
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Tillv. art.nr14910F0GJSX10503KA
VarumärkeVishay
99,68 kr
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50 kΩ Rotary 1 1 Panel Mount, Through Hole 1W 6.35 mm Linear - Cermet Pin ±10% 149 22.2mm
RS-artikelnummer 522-5305
Tillv. art.nr93R1A-R22-A15L
VarumärkeBourns
52,11 kr
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10 kΩ Rotary 1 1 Panel Mount, Through Hole 2W 6 mm Linear - Cermet PC Pin ±10% 93 22mm
RS-artikelnummer 743-5683
Tillv. art.nrP11L1V0FLSY00103KA
VarumärkeVishay
111,47 kr
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10 kΩ Rotary 1 1 Panel Mount 0.1W 6 mm Linear - Cermet Solder Lug ±10% P11L 25mm
RS-artikelnummer 167-5472
Tillv. art.nr95A1A-B28-B15L
VarumärkeBourns
28,058 kr
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10 kΩ Rotary 1 1 Panel Mount 0.5W 6.35 mm Linear - Conductive Plastic Solder Lug ±20% 95 22.2mm
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VarumärkeRS PRO
1 681,39 kr
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5 kΩ Linear - 1 Spring Return - - Linear - Conductive Plastic - ±20% WT22 -
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Tillv. art.nr95A1A-B28-B15L
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28,62 kr
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10 kΩ Rotary 1 1 Panel Mount 0.5W 6.35 mm Linear - Conductive Plastic Solder Lug ±20% 95 22.2mm
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VarumärkeRS PRO
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2 kΩ - 1 - Panel Mount 1W 6.35 mm - - Wirewound Solder ±10% P25 25mm
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Tillv. art.nrPDB241-GTR02-254A2
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21,077 kr
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250 kΩ Rotary 1 1 Panel Mount 0.25W 6.35 mm Audio - Carbon Solder Lug ±20% PDB241-GTR 19mm
RS-artikelnummer 162-2565
Tillv. art.nr3310H-001-502L
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5 kΩ Rotary 1 2 Panel Mount, Through Hole 0.25W 3.18 mm Linear - Conductive Plastic PC Pin ±20% 3310 12.7mm
RS-artikelnummer 790-4429
Tillv. art.nrP16NP474MAB15
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136,59 kr
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470 kΩ Rotary 1 1 Panel Mount 0.26W 16 mm Linear - Cermet Solder Lug ±20% P16 8.8mm
RS-artikelnummer 172-6351
Tillv. art.nrRK0971110702
VarumärkeAlps Alpine
11,567 kr
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50 kΩ Rotary 1 - Panel Mount, Through Hole 0.05W 6 mm Logarithmic - - Pin ±20% RK097 -
RS-artikelnummer 164-2677
Tillv. art.nr6639S-1-103
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155,72 kr
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10 kΩ Rotary Continuous 1 Panel Mount 1W 6.35 mm Linear - Conductive Plastic Solder Turret ±15% 6639 22.2mm
RS-artikelnummer 167-5483
Tillv. art.nrPDB181-GTR01-504A2
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13,477 kr
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500 kΩ Rotary - 1 Panel Mount 0.1W 6 mm Logarithmic - Carbon Solder Lug ±20% PDB181-GTR 19mm
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Tillv. art.nr6630S0D-C28-A103
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10 kΩ Rotary Continuous 1 Panel Mount 1W 6.35 mm Linear - Conductive Plastic Solder Lug ±15% 6630 22.2mm
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Tillv. art.nrPDB241-GTR02-254A2
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250 kΩ Rotary 1 1 Panel Mount 0.25W 6.35 mm Audio - Carbon Solder Lug ±20% PDB241-GTR 19mm
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Tillv. art.nrRK1631110TV6
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50 kΩ Rotary 1 - Panel Mount, Through Hole 0.1W 6 mm Linear - - Pin ±20% RK163 -
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10 kΩ Rotary 1 1 Panel Mount, Through Hole 2W 6 mm Linear - Cermet PC Pin ±10% 93 22mm
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