RHL25K

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Rotary Potentiometers and Rheostats are two very distinct electronic components, each with its own purpose and function. In this article, we\'ll explore the RHL25K application field and working principle with a focus on the differences between the two components.

Rotary Potentiometers are small mechanical devices composed of two or more terminals and a rotating shaft. When the shaft is turned, the output voltage or current is varied in a linear fashion which is referred to as the resistance-position characteristic. The output voltage or current can be used to control the brightness of a lightbulb, the speed of a motor, or the volume of an audio amplifier.

Unlike Rotary Potentiometers, Rheostats are purely resistive devices that don\'t contain any active components. Rheostats consist of a metal or carbon disk that is wrapped with an identical length of wire. When the voltage across the wire is increased a resistive force is generated which is proportional to the coil\'s inductance. This resistive force opposes the current, creating a counter-electromotive force (EMF). Rheostats are typically used in applications where an adjustable voltage or current is needed in order to maintain a stable operation.

The RHL25K is a low-power, miniature rotary potentiometer/rheostat suitable for a wide range of applications. Its small size and low profile makes it an ideal choice for applications where smaller components are essential. The RHL25K features a 7.5mm diameter and 5mm height, and is available in an extended range of resistance values from 0 to 25K ohms.

The RHL25K consists of two main components, a wafer-terminal resistor and an integral metal-disk rheostat. The wafer-terminal resistor provides a standard resistance-position characteristic with a linear voltage or current output. On the other hand, the metal disk-rheostat section is used to create a counter-EMF and adjust the voltage or current output. By controlling the rotary dial, the desired voltage or current can be achieved.

The RHL25K can be used in a variety of industrial and commercial applications, such as motor speed control, electric testing, AC circuit testing, audio amplification, and display dimming. It is also ideal for devices requiring a low-power source, making it an excellent choice for remote sensors or applications with limited power budgets.

In conclusion, the RHL25K is a versatile and efficient rotary potentiometer/rheostat component designed for applications requiring an adjustable voltage or current. Its small size and low profile makes it an ideal choice for applications where smaller components are essential. Additionally, its wide resistance range and unique rheostat section make it the perfect choice for applications requiring the adjustment of voltage or current outputs.

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