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 Price 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庫存編號 460-1944
製造零件編號535B1502JC
BrandVishay
TWD811.00
單位
5 kΩ Linear 5 - Panel Mount 1.5W 6.35 mm - - - Solder Lug ±5% 535 -
RS庫存編號 167-9493
製造零件編號535B1502JC
BrandVishay
TWD759.90
個 (以毎盒:10)
單位
5 kΩ Rotary 5 1 Panel Mount 1.5W 6.35 mm Linear - Wirewound Solder Lug ±5% 535 22.2mm
RS庫存編號 167-9767
製造零件編號357B0103MAB251S22
BrandVishay
TWD990.20
個 (以毎盒:50)
單位
10 kΩ Rotary Continuous 1 Panel Mount 1W 22 mm Linear - Conductive Plastic Turret ±20% 357 22
RS庫存編號 460-2048
製造零件編號357B0103MAB251S22
BrandVishay
TWD1,238.00
單位
10 kΩ Rotary Continuous 1 Panel Mount 1W 22 mm Linear - Conductive Plastic Turret ±20% 357 22
RS庫存編號 167-9505
製造零件編號157S103MB9002
BrandVishay
TWD2,331.10
個 (以毎盒:10)
單位
10 kΩ Rotary 1 1 Servo Mount 1W 3.18 mm Linear - Conductive Plastic Turret ±20% 157 22.2mm
RS庫存編號 173-580
製造零件編號157S103MB9002
BrandVishay
TWD2,331.00
單位
10 kΩ Rotary 1 1 Servo Mount 1W 3.18 mm Linear - Conductive Plastic Turret ±20% 157 22.2mm
RS庫存編號 167-9564
製造零件編號248FGJS0XB25102MA
BrandVishay
TWD331.80
個 (以毎盒:50)
單位
1 kΩ Rotary 1 1 Panel Mount, Through Hole 0.5W 6.35 mm Linear - Conductive Plastic Pin ±20% 248 22.2mm
RS庫存編號 410-356
製造零件編號248FGJS0XB25102MA
BrandVishay
TWD417.00
單位
1 kΩ Rotary 1 1 Panel Mount, Through Hole 0.5W 6.35 mm Linear - Conductive Plastic Pin ±20% 248 22.2mm
RS庫存編號 790-4435
製造零件編號P16NP472MAB15
BrandVishay
TWD489.00
單位
4.7 kΩ Rotary 1 1 Panel Mount 1W 16 mm Linear - Cermet Solder Lug ±20% P16 8.8mm
RS庫存編號 167-8751
製造零件編號P16NP472MAB15
BrandVishay
TWD489.30
個 (以毎盒:20)
單位
4.7 kΩ Rotary 1 1 Panel Mount 1W 16 mm Linear - Cermet Solder Lug ±20% P16 8.8mm
RS庫存編號 167-9487
製造零件編號534B1103JL
BrandVishay
TWD776.10
個 (以毎盒:10)
單位
10 kΩ Rotary 10 1 Panel Mount 2W 6.35 mm Linear - Wirewound Solder Lug ±5% 534 20.6mm
RS庫存編號 460-7526
製造零件編號534B1103JL
BrandVishay
TWD867.00
單位
10 kΩ Rotary 10 1 Panel Mount 2W 6.35 mm Linear - Wirewound Solder Lug ±5% 534 20.6mm
RS庫存編號 850-9794
製造零件編號534-1-1-103
BrandVishay
TWD472.00
單位
10 kΩ Rotary 10 1 Bushing Mount 2W 6.35 mm Linear - Wirewound Turret ±5% 534 20.6mm
RS庫存編號 173-574
製造零件編號157S502MB9002
BrandVishay
TWD2,354.00
單位
5 kΩ Rotary 1 1 Servo Mount 1W 3.18 mm Linear - Conductive Plastic Turret ±20% 157 22.2mm
RS庫存編號 850-9779
製造零件編號533-1-1-102
BrandVishay
TWD861.00
單位
1 kΩ Rotary 3 1 Bushing Mount 1W 6.35 mm Linear - Wirewound Turret ±5% 533 22.2mm
RS庫存編號 173-760
製造零件編號157B103MX9001
BrandVishay
TWD995.00
單位
10 kΩ Rotary 1 1 Panel Mount 1W 6.35 mm Linear - Conductive Plastic Turret ±20% 157 22.2mm
RS庫存編號 162-2384
製造零件編號157B103MX9001
BrandVishay
TWD823.90
個 (以毎盒:10)
單位
10 kΩ Rotary 1 1 Panel Mount 1W 6.35 mm Linear - Conductive Plastic Turret ±20% 157 22.2mm
RS庫存編號 167-9482
製造零件編號157S502MB9002
BrandVishay
TWD2,354.10
個 (以毎盒:10)
單位
5 kΩ Rotary 1 1 Servo Mount 1W 3.18 mm Linear - Conductive Plastic Turret ±20% 157 22.2mm
RS庫存編號 486-7093
製造零件編號534B1103JC8872
BrandVishay
TWD565.00
單位
10 kΩ Rotary 10 1 Panel Mount 2W 6 mm Linear - Wirewound Solder Lug ±5% 534 20.6mm
RS庫存編號 167-9569
製造零件編號534B1103JC8872
BrandVishay
TWD565.50
個 (以毎盒:10)
單位
10 kΩ Rotary 10 1 Panel Mount 2W 6 mm Linear - Wirewound Solder Lug ±5% 534 20.6mm