About Potentiometers, Trimmers & Rheostats

Potentiometers, Trimmers & Rheostats

A potentiometer, trimmer, and rheostat are all three types of resistors that are adjustable. They are used to control the electric current by varying the resistance in the circuit. A potentiometer is an adjustable three-terminal resistor with a sliding contact (wiper) that moves across a resistive element to change resistance in a circuit. They are used in audio controls, light dimmers, and other applications that require adjustable resistance in the circuit. A trimmer is a miniature version of a potentiometer, and it’s used to make fine adjustments in electronics circuits. It can be used for voltage and current adjustments, and for tuning circuits for maximum performance. A rheostat is an adjustable two-terminal rotor, and it’s used to control the current in a circuit. It’s often used to control the speed of a motor or other electrical device.
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3590S-4-203L


Bourns Precision Potentiometers 78"WW 20Kohms 0.25% 10turn
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Bourns 60
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USD 15.8591
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53C12500Z


Res Conductive Plastic POT 2.5K Ohm 10% 2W 1(Elec)/1(Mech)Turns 6.35mm (65.09 X 27.78 X 36.12mm) Solder Lug Panel Mount Automotive
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Honeywell 60
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USD 18.0698
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357B0202MAB251S22


Potentiometers 22.2mm 2Kohm 20% Slotted FMF Shaft
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Vishay 60
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USD 21.1945
Multiples of: 1

381N1MEG


1M Ohm 1 Gang Linear Panel Mount Potentiometer None 1.0 Kierros Conductive Plastic 1W Solder Lug
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Honeywell 60
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USD 22.3616
Multiples of: 2

43C125K


Res Wirewound POT 25K Ohm 5% 2W 1(Elec)/1(Mech)Turn 6.35mm (65.88 X 28.58 X 38.89mm) Solder Lug Panel Mount
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Honeywell 60
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USD 35.385
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249FGJSPXB25504KA


Vishay 249 F GJ S P X BO50 500K 10% A e3
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Vishay 59
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USD 17.8274
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PT10LV10-252A2020


Trimmer Resistors - Through Hole 2.5Kohms 10mm Rnd Top adj
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Amphenol 59
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USD 0.1736
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3329H-1-102


Precision Potentiometer 1KOhms ±10% ±250ppm/℃ 3329H RoHS
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Guosheng 59
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USD 0.3061
Multiples of: 1

3386W-1-503LF


Trimmer Resistors - Through Hole 3/8" 50Kohms 10% 0.5Watts Square
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Bourns 59
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USD 0.4956
Multiples of: 1

PE30L0FR472MAB


Potentiometers PE30 AL 4K7 20% A BO e3
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Vishay 56
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USD 25.415
Multiples of: 1

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