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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3549S-2AC-103/103B


Precision Potentiometers PRECISION POT-7/8" 22MM DIA 10T WW
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Bourns 61
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USD 41.124
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3SU1200-2PS10-1AA0


Potentiometer; 22mm; -25÷70°C; Ø22mm; IP67; 10kΩ; SIRIUS ACT
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Siemens 61
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USD 58.0671
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78MKV-128


Precision Potentiometers WOONSOCKET POSITION
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Honeywell 61
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USD 525.6875
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Hot 3296X-1-472LF


Trimmer Resistors - Through Hole 3/8" 4.7Kohms Sealed Horizontal Adjust
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Bourns 60
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USD 0.9012
Multiples of: 1

11VR1X20F2N103B1


Potentiometers 300Deg 100kOhm -10C +70C Flat Shaft
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CTS 60
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USD 0.9996
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3006W-1-201LF


Trimmer Resistors - Through Hole 200ohm 3/4" 10% Sealed Mutlti Turn
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Bourns 60
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USD 1.0663
Multiples of: 100

89PHR20


Res Cermet Trimmer 20 Ohm 20% 0.75W(3/4W) 20(Elec)Turn 2.36mm (20.57 X 4.83 X 8.64mm) Pin Thru-Hole Box
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TT Electronics 60
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USD 1.3125
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3339H-1-203LF


20 kOhms 0.5W, 1/2W PC Pins Through Hole Trimmer Potentiometer Cermet 4.0 Turn Top Adjustment
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Bourns 60
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USD 1.3721
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PDA17-SN20-102BK


Potentiometers 1K 20% 17mm Linear
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Bourns 60
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USD 1.7664
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3310C-111-102L


Potentiometers 9mm 1Kohms Single Cup
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Bourns 60
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USD 2.3631
Multiples of: 50

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