PTV111-1420A-A203

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Rotary Potentiometers and Rheostats：PTV111-1420A-A203 Application Field and Working Principle

A rotary potentiometer, also known as a pot, or trimmer, is an electronic component that allows users to adjust the resistance of a circuit by physically turning a screw or shaft. It is typically used to adjust or vary the frequency of audio output from a device, for volume control, or to help synchronize audio and video signals. The main differences between a potentiometer and a rheostat is that a potentiometer typically has three terminals, while a rheostat only has two.

The PTV111-1420A-A203 is a rotary potentiometer with three terminals that provides a continuous resistance control from the end-point to the center-point, within a specified resistance range. This potentiometer also has an electronic switch (normally open circuit) within the center point that can be triggered remotely. The switch will be closed when the actuating shaft is turned clockwise to the center point. The PTV111-1420A-A203 is commonly used in automotive applications such as audio volume and speed control.

The operating principle of the PTV111-1420A-A203 is based on its wiper contact design. As the rotary shaft is turned, the contact between the wiper and the resistive element varies, providing an adjustable resistance value. The resistance of the potentiometer is determined by the distance between the wiper and the resistive element. The precision of the value adjustable by the potentiometer is limited by the pitch of the screw and the resolution of the rotary shaft.

The PTV111-1420A-A203 has an extended temperature range of -40°C to 85°C, and its long life allows it to withstand up to 200,000 cycles, making it a reliable solution for applications subject to harsh environmental conditions. The potentiometer is housed in a thermoplastic case and is protected by an aluminum core shield that helps to reduce electrical noise. The potentiometer also has a reinforced die-cast base that provides mechanical stability and helps reduce contact wear and stability drift.

The PTV111-1420A-A203 provides a wide range of applications, from automotive sound control to frequency control in audio systems. The stereo balance control is one example of the possible applications of the potentiometer. By connecting a fixed resistance to the two terminals of the potentiometer and running the voltage through the center terminal in the middle, it is possible to achieve stereo balance adjustment.

In conclusion, the PTV111-1420A-A203 is a reliable rotary potentiometer that can provide a continuous resistance control from end-point to center-point within a specified resistance range. Its extended temperature range and long life make it suitable for a wide variety of industrial applications. The electronic switch inside the potentiometer allows for remote control and in combination with its wiper contact design, it provides an adjustable resistance value.

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