392JA250K

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Rotary Potentiometers, Rheostats, have become increasingly important in various applications such as audio equipment, consumer electronics, and test and measurement instruments. As such, it is important to understand how these components work and the different types available.

392JA250K Description and Working Principle

The 392JA250K is a 3-wire rotating potentiometer. It is constructed from a carbon element attached to a shaft with a soldered terminal connected to the shaft. It is designed specifically for low 4mA and 8mA current drive applications with excellent linearity. The device has a rotation facility with a total rotation range of 330°. The operating temperature range for this component is –40℃ to +70℃.

The basic working principle of this component is that it is a three-terminal device that consists of a wiper contact which is moved over a resistive element as the knob is rotated. As the wiper moves, a linear change in resistance occurs between the two terminals connected to the ends of the resistive element. The third terminal of the device is connected to the wiper and produces a voltage relative to the voltage at the two terminals connected to the ends of the resistive element.

Applications of 392JA250K

The 392JA250K is ideally suited for a range of different applications, including:

• Volume and frequency control circuits
• Gain and balance control circuits
• Lighting dimming and control
• Motor speed control

It is also suitable for applications such as potting, encapsulating and casting, as it can be used in temperatures up to +70℃. It offers good stability and a reliable resistance value.

Conclusion

The 392JA250K is a rotary potentiometer that is ideal for applications where linearity and high-quality performance are required. It is designed for low-current drive applications, and is suitable for a range of different applications, including volume and frequency control circuits, gain and balance control circuits, motor speed control and lighting dimming and control.

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