Nonprecision Wire Wound Variable Resistor
Item Name Code (INC) 37406
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A resistor in which a sliding or rolling contact moves over an exposed area of the resistive element to change the ohmic value of the output. The functional tolerance (linearity), if given, of the output is greater than plus of minus 1 percent on linear outputs. Specified outputs such as sine, cosine, tangent, etc., shall be considered to be precision. For items having manually positioned taps designed to be set and fixed prior to use, see RESISTOR, ADJUSTABLE. For items with step by step variation, see RHEOSTAT and RESISTOR, STEP BY STEP. For tandem-mounted items designed to function together as an attenuator (and rated accordingly), see ATTENUATOR, VARIABLE. Excludes RESISTOR (1), VARIABLE, NONWIRE WOUND, NONPRECISION; RESISTOR (1), VARIABLE, NONWIRE WOUND, PRECISION; and RESISTOR (1), VARIABLE, WIRE WOUND, PRECISION.
Additional Information for Nonprecision Wire Wound Variable Resistor
Nonprecision wire wound variable resistors are a type of resistor that is used to vary the resistance in an electrical circuit. They are commonly used in applications where precise resistance values are not required, such as in volume controls or dimmer switches.
These resistors are made by winding a resistive wire, typically made of an alloy such as nichrome, around a ceramic or plastic core. The wire is wound in a helical pattern, which allows for the resistance to be adjusted by rotating a shaft or knob attached to the resistor.
Nonprecision wire wound variable resistors are known for their durability and stability, as the wire winding provides a large surface area for heat dissipation. This makes them suitable for applications where the resistor may be subjected to high temperatures or high power dissipation.
In the supply group of electrical and electronic equipment components, nonprecision wire wound variable resistors are commonly found. They are available in various resistance values and power ratings to suit different applications.