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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3310P-025-104L


Potentiometers 1/4W 100Kohm 20% 9mm Sq Panel Control
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Bourns 48
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USD 2.553
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89WR5KLF


Trimmer Resistors - Through Hole 3/4" Rect 5K 10% 20-turn
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TT Electronics 48
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USD 2.6082
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3224J-1-473E


Trimmer Resistors - SMD 4mm 47Kohms 10% Square Cermet Sealed
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Bourns 48
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USD 2.886
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3339P-1-101LF


100 Ohms 0.5W, 1/2W PC Pins Through Hole Trimmer Potentiometer Cermet 4.0 Turn Top Adjustment
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Bourns 48
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USD 3
Multiples of: 50

44GR50KLFTB


Trimmer Resistors - SMD 1/4W 50K Ohms 10% MULTI TURN
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TT Electronics 48
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USD 3.0226
Multiples of: 100

3266Z-1-500


Trimmer Resistors - Through Hole 1/4" 50ohms 10% SQ W/Standoff Sealed
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Bourns 48
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USD 3.1125
Multiples of: 10

68XR20K


Res Cermet Trimmer 20K Ohm 10% 0.5W(1/2W) 20(Elec)Turn 2.29mm (11.05 X 6.22 X 9.53mm) Pin Thru-Hole Box
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TT Electronics 48
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USD 3.2287
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PR167 2K2 A 20P1


Potentiometer: shaft; single turn; 2.2kO; 100mW; ±20%; 6mm; carbon
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Telpod 48
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USD 3.627
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3339W-1-203LF


20 kOhms 0.5W, 1/2W PC Pins Through Hole Trimmer Potentiometer Cermet 4.0 Turn Side Adjustment
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Bourns 48
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USD 3.8755
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ACCTR514-4002


Potentiometer Tools & Hardware SHAFT LOCK BUSHING
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Vishay 48
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USD 4.0829
Multiples of: 1

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