P231-EC30AR250K

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Rotary potentiometers and rheostats are electrical components typically used to adjust the resistance to change the flow of current in a circuit and are often found in audio applications. The P231-EC30AR250K from the American company, Vishay, is one such device. In this article, the application and working principle of this popular component will be described.

The P231-EC30AR250K is a single-turn ceramic-film rotary potentiometer with a resistance range of 250 kΩ, a linear power rating of 0.2 W, and an insulation resistance of 100 MΩ. Its standard mechanical rotational lifetime is stereotyped at 25,000 cycles, and the component has a temperature coefficient of -1000 ppm/°C. It also has a temperature range from -55°C to +155°C.

The component is suited to be used in many applications due to its adjustable resistance parameters. It is particularly useful for applications that require precise system control, such as audio volume control and equaliser adjustment. In these applications, the potentiometer can be adjusted by the user to obtain the desired sound level output. Furthermore, it can also be used in devices such as set-top boxes, LED dimmers, and active filters.

In terms of its operating principle, the P231-EC30AR250K consists of a resistor formed onto a ceramic substrate which is usually in a U-shaped configuration. A base and two wiper contacts, one of which can be adjusted, are mounted to the resistor material. The wiper contact is connected to two linear tapers which are connected to the sliding contact, and is in turn connected to the resistive material. The operation of such a potentiometer is that as the slider contact is moved, the resistance between the two wiper contacts, and between the wiper contact and the resistive material changes.

In summary, the P231-EC30AR250K is a single-turn ceramic-film rotary potentiometer manufactured by the American company, Vishay. The component is most suited for applications which require precise system control and it can be used for audio volume control, equaliser adjustment, set-top boxes, LED dimmers, and active filters. The component operates by changing the resistance between two wiper contacts which are connected to a resistive material as the slider contact is adjusted.

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