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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72PR20LF


Trimmer Resistors - Through Hole 3/8" Squ 20 10%
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TT Electronics 48
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USD 1.35
Multiples of: 100

RK12L12C0-F30-C0-A503


Potentiometers POT
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ALPS 48
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USD 1.3685
Multiples of: 1

3329P-1-105LF


1 MOhms 0.5W, 1/2W PC Pins Through Hole Trimmer Potentiometer Cermet 1.0 Turn Top Adjustment
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Bourns 48
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USD 1.426
Multiples of: 1

3299Z-1-204LF


200 kOhms 0.5W, 1/2W PC Pins Through Hole Trimmer Potentiometer Cermet 25.0 Turn Side Adjustment
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Bourns 48
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USD 1.587
Multiples of: 1

PTA4543-2015CPB202


Bourns Slide Potentiometers 2K LINEAR
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Bourns 48
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USD 1.6632
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ST-32EB101


Trimmer Resistors - SMD 100 W 3mm SMD single turn gull-wing, top adj.
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Nidec Copal 48
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USD 1.6758
Multiples of: 1

82PAR100KLF


Trimmer Resistors - Through Hole 1/2W 100K Ohms 10% SINGLE TURN
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TT Electronics 48
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USD 1.7271
Multiples of: 50

P082N-161F1CAR100K


Res Conductive Plastic POT 100K Ohm 20% 0.025W 1(Elec)/1(Mech)Turns 4.75mm (17 X 7.7 X 9.35mm) Pin Panel Mount/Through Hole
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TT Electronics 48
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USD 1.896
Multiples of: 10

3296Y-1-205


Trimmer Resistors - Through Hole 38" 2Mohms Sealed Vertical Adjust
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Bourns 48
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USD 1.9895
Multiples of: 1

3386X-DF6-105LF


Trimmer Resistors - Through Hole 3/8" SQ TRIM POT 1M ST SEALED CERMET
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Bourns 48
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USD 2.2244
Multiples of: 50

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