An Adjustable Power Resistor is a type of variable resistor which allows you to change the resistance within a circuit manually. The primary function of these components is to control the current flow and adjust the signal levels, thereby managing the power that's being distributed within electronic devices. They are widely used for tuning and calibration in electrical circuits, serving as a rheostat or a potential divider. With the ability to dissipate power as heat, they are essential in applications where power levels need to be adjusted or limited to prevent damage to sensitive components.
Main uses of Adjustable Power Resistors include setting the correct operating conditions in circuit prototypes, controlling the brightness of lights, adjusting motor control, and managing the temperature in heating devices. These resistors are characterized by their robust construction, high power handling capabilities, and ability to withstand high temperatures. They come in various forms, such as slide, rotary, or trimmer types, each suited to different applications. Several known manufacturers of Adjustable Power Resistors are Vishay, Bourns, TT Electronics, and Honeywell.