P090S-04T20AR10K

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Rotary Potentiometers and Rheostats

The P090S-04T20AR10K is an electro-mechanical device that measures or adjusts electrical resistance. It is typically used as a precision voltage divider or adjustable current limiter. It generally falls into the larger family of devices known as rotary potentiometers and rheostats.

Application Field

The P090S-04T20AR10K can be used in a number of different applications. It may be used as a volume control in audio amplifiers or radios. It may also be used to measure voltage in electrical circuits, as a variable resistor in electronic circuits or for position feedback in motor control applications. In addition, it may be used for brushless motor field controller designs or as indication for emergency power systems.

Working Principle

The P090S-04T20AR10K is an all-purpose sliding contact device. It is often called a rotary potentiometer or rheostat, and is composed of a spindle, wiper, contact, and resistance elements. It is characterized by its linearity and accuracy, and is usually rated for up to 100-250mA.

The resistance value of the P090S-04T20AR10K varies when the spindle is rotated. It is usually attached to a knob to allow easier adjustment of the resistance value. As the knob is turned, the wiper contact slides across the resistive surface and changes the resistance value from its minimum to its maximum. The linearity of the device is ensured by shaping the resistive element into a spiral track.

When precise control is required, the P090S-04T20AR10K may be used as part of a voltage-dividing circuit. In this application, the wiper is connected to a fixed voltage reference, and the two ends of the track are connected to the input voltage source. As the spindle is rotated, the voltage at the wiper changes proportional to the angular displacement, providing an accurate and stable voltage output.

In addition to its use as a voltage divider, the P090S-04T20AR10K can also be used as an adjustable current limiter. In this application, the wiper is connected to a positive voltage source, and the two ends of the track are connected to a load. As the load current increases, the voltage at the wiper and the resistance of the device decrease, limiting the current to a safe range.

Conclusion

The P090S-04T20AR10K is a versatile device that can be used as a voltage divider, adjustable current limiter, and more. It is typically attached to a knob for easy adjustment, and its linearity and accuracy are ensured by its design. The device is well-suited for a variety of applications, including audio amplifiers, electronic circuits, brushless motor field controllers, and emergency power systems.

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