Potentiometers

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.

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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. 831-6791
FabrikantnummerJA1N056S252UA
FabrikantHoneywell
77,19 €
Each
Aantal stuks
2.5 kΩ Rotary 1 1 Panel Mount 2W 6.35 mm Linear - Carbon Solder ±10% J 22.2mm
RS-stocknr. 831-8797
Fabrikantnummer53C32500
FabrikantHoneywell
14,16 €
Each
Aantal stuks
2.5 kΩ Rotary - 1 Panel Mount 2W 6.35 mm Linear - Conductive Plastic Solder Lug ±10% 53C 22.2mm
RS-stocknr. 831-0686
Fabrikantnummer73JA1K
FabrikantHoneywell
18,76 €
Each
Aantal stuks
1 kΩ Rotary 10 1 Panel Mount 2W 6.35 mm Linear - Wirewound Solder Lug ±5% 73 20.6mm
RS-stocknr. 831-8826
Fabrikantnummer53C35MEG
FabrikantHoneywell
18,69 €
Each
Aantal stuks
5 MΩ Rotary - 1 Panel Mount 2W 6.35 mm Linear - Conductive Plastic Solder Lug ±20% 53C 22.2mm
RS-stocknr. 853-6800
Fabrikantnummer53C25K
FabrikantHoneywell
16,73 €
Each
Aantal stuks
5 kΩ Rotary 1 1 Surface Mount 2W 6.35 mm Linear - Conductive Plastic Solder Lug ±10% 53C 15.9mm
RS-stocknr. 831-6669
Fabrikantnummer53C110K
FabrikantHoneywell
17,32 €
Each
Aantal stuks
10 kΩ Rotary - 1 Panel Mount 2W 6.35 mm Linear - Conductive Plastic Solder Lug ±10% 53C 19.1mm
RS-stocknr. 831-8781
Fabrikantnummer53C31MEG
FabrikantHoneywell
15,65 €
Each
Aantal stuks
1 MΩ Rotary - 1 Panel Mount 2W 6.35 mm Linear - Conductive Plastic Solder Lug ±10% 53C 22.2mm
RS-stocknr. 831-0431
Fabrikantnummer380C110K
FabrikantHoneywell
22,42 €
Each
Aantal stuks
10 kΩ Rotary - 1 Panel Mount 2W 6.35 mm Linear - Conductive Plastic Solder Lug - 380 50.8mm
RS-stocknr. 831-8788
Fabrikantnummer53C3250
FabrikantHoneywell
14,23 €
Each
Aantal stuks
250 Ω Rotary - 1 Panel Mount 2W 6.35 mm Linear - Conductive Plastic Solder Lug ±10% 53C 22.2mm
RS-stocknr. 831-0447
Fabrikantnummer380C12500
FabrikantHoneywell
21,53 €
Each
Aantal stuks
2.5 kΩ Rotary - 1 Panel Mount 2W 6.35 mm Linear - Conductive Plastic Solder Lug ±10% 380 50.8mm
RS-stocknr. 831-6785
FabrikantnummerJA1N056S202UA
FabrikantHoneywell
71,30 €
Each
Aantal stuks
2 kΩ Rotary 1 1 Panel Mount 2W 6.35 mm Linear - Carbon Solder ±10% J 22.2mm
RS-stocknr. 831-8769
Fabrikantnummer53C3100K
FabrikantHoneywell
15,36 €
Each
Aantal stuks
100 kΩ Rotary - 1 Panel Mount 2W 6.35 mm Linear - Conductive Plastic Solder Lug ±10% 53C 22.2mm
RS-stocknr. 831-0605
Fabrikantnummer392JA10K
FabrikantHoneywell
11,03 €
Each
Aantal stuks
10 kΩ Rotary - 1 Panel Mount 0.5W 3.18 mm Linear - Conductive Plastic PC ±10% 392 22.2mm
RS-stocknr. 831-0695
Fabrikantnummer73JA2K
FabrikantHoneywell
71,07 €
Each
Aantal stuks
2 kΩ Rotary 10 1 Panel Mount 2W 6.35 mm Linear - Wirewound Solder Lug ±5% 73 -
RS-stocknr. 831-8772
Fabrikantnummer53C31K
FabrikantHoneywell
14,63 €
Each
Aantal stuks
1 kΩ Rotary - 1 Panel Mount 2W 6.35 mm Linear - Conductive Plastic Solder Lug ±10% 53C 22.2mm
RS-stocknr. 831-8731
Fabrikantnummer53C21K
FabrikantHoneywell
19,79 €
Each
Aantal stuks
1 kΩ Rotary - 1 Panel Mount 2W 6.35 mm Linear - Conductive Plastic Solder Lug ±10% 53C 15.9mm
RS-stocknr. 831-8807
Fabrikantnummer53C350
FabrikantHoneywell
13,31 €
Each
Aantal stuks
50 Ω Rotary - 1 Panel Mount 2W 6.35 mm Linear - Conductive Plastic Solder Lug ±10% 53C 22.2mm
RS-stocknr. 831-6678
Fabrikantnummer53C11K
FabrikantHoneywell
15,31 €
Each
Aantal stuks
1 kΩ Rotary - 1 Panel Mount 2W 50.8 mm Linear - Conductive Plastic Solder Lug ±10% 53C 50.08mm
RS-stocknr. 831-6772
FabrikantnummerJA1N056S102UA
FabrikantHoneywell
81,71 €
Each
Aantal stuks
1 kΩ Rotary 1 1 Panel Mount 2W 6.35 mm Linear - Carbon Solder ±10% J 22.2mm
RS-stocknr. 831-0336
Fabrikantnummer308N10K
FabrikantHoneywell
13,56 €
Each
Aantal stuks
10 kΩ Rotary - 1 - 0.5W 3.18 mm Linear - Conductive Plastic Solder Hook ±10% 308 19.1mm