P140KH-F20AR50K

Series:	*
Part Status:	Active
Lead Free Status / RoHS Status:	--

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Rotary Potentiometers

A rotary potentiometer, also known as a trimmer potentiometer, single-turn potentiometer, or rotary dial, is a popular type of variable resistor. The unit consists of a resistive element that is rotated, so that the applied potentiometer signal can be varied. The device is typically used to control the electrical signal output, or to measure the input signal level.Rotary potentiometers are extremely popular because they are low-cost, easy to use, and highly reliable. They are most commonly used in electronic circuits, such as amplifiers, receivers, and mixers. The primary application of the unit is adjusting the amplitude of an electrical signal, while also providing isolation between the controlling signal and the output.

P140KH-F20AR50K

The P140KH-F20AR50K is a single-turn rotary potentiometer that offers a variety of features and benefits. It is a cost-effective solution for applications requiring the adjustment of signal levels or control of electrical circuits. Its integrated features provide improved accuracy, higher output power, long life, and the ability to withstand harsh environmental conditions.The unit is constructed of a plastic body with a unique mechanical life of 1000 cycles, allowing the unit to withstand constant wear, vibrations, and shock during long periods of use. The integrated features also provide improved temperature stability and resistance to aging. The device offers dual anti-noise shielding and a 20,000-ohm resistance with linear segmentation, making it ideal for use in sensitive circuits.Another benefit of this device is its easy-to-use design and control knob. The unit is provided with an easy-to-adjust two-position click knob for precision adjustment. The device is also RoHS compliant, making it suitable for use in a wide range of industrial and consumer applications.

Working Principle

The working principle of a rotary potentiometer is based on the resistance of a conductive material, such as carbon film, being changed when it is rotated. As the resistive element is turned, a voltage is generated that is related to the resistance of the material and the mechanical position of the element.The resistance of the resistive element is typically fixed, so an adjustable knob is available to control the length of the resistance. When the knob is turned, the length of the resistive element increases or decreases, resulting in a change in the voltage generated. This voltage is then fed into the circuit, allowing the user to adjust the signal level or control the circuit.

Rheostats

Rheostats are also a type of variable resistor. They are used to control the flow of electric current in a circuit, by adjusting the resistance of the element. The main application is to adjust the performance of motors, lights, and other electrical devices. Rheostats are also used in resistance thermometers, which are used to measure temperatures.Unlike rotary potentiometers, rheostats are constructed of a large block of resistors, which allows for greater flexibility, with up to 20 levels of adjustment. This allows for more precise control, making rheostats ideal for applications that require precise performance settings.Rheostats can also be used in circuits to control current and voltage. By adjusting the resistance, the current can be restricted, allowing the user to control the energy consumption, or the voltage of the circuit can be regulated. This makes rheostats ideal for use in power supplies.

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