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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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
Multiples of: 1

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
Multiples of: 1

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

62MR50LF


Trimmer Resistors - Through Hole 1/2W 50 Ohms 20% SINGLE TURN
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TT Electronics 59
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USD 1.525
Multiples of: 100

PDB182-GTR01-503B0


Bourns Potentiometers PANEL CONTROL 17MM-ST-CARBON
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Bourns 59
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USD 1.3821
Multiples of: 1

PRS11R-225F-N203A3


Potentiometers 20K 20% 11MM ROTARY POT
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Bourns 59
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USD 1.886
Multiples of: 1

3310H-101-103L


Potentiometers 1/4W 10Kohm 20% 9mm Sq Panel Control
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Bourns 59
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USD 8.3232
Multiples of: 1

CW-18-10K-P4


Potentiometer: shaft; single turn; 10kO; 1W; ±20%; 4mm; linear; THT
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Telpod 59
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USD 13.091
Multiples of: 1

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