CT9EX202

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Trimmer potentiometers represent an important component for delivering electrical power and are among the most popular products used in industrial settings and home electronics. The model CT9EX202 is a 3-terminal device that is highly effective at adjusting resistance in a circuit for applications where reliable, repeatable accuracy is critical. This section will discuss STMicroelectroninc’s CT9EX202 trimmer potentiometer, its application fields, and its working principle.

Applications

The versatility of the CT9EX202 trimmer potentiometer makes it an ideal choice for many applications. The device is promising for performing wheel-to-wheel and board-to-board potentiometer rotations up to 90° within tight spaces. Its rotational limit switch allows the device to be used for applications that must be able to control an item or system between two positions. This trimmer can also be used for applications where potentiometer motion must be reversibly swung back and forth in one direction.

The CT9EX202 is especially suited for automotive applications such as controls for temperature, volume and other functions. Its long-term reliability of resistance and dielectric strength makes it effective for applications such as adjusting fuel pumps and temperature sensors in cars, as well as controlling sound systems in boats and personal watercraft. It has also become an increasingly popular choice for audio and video equipment for “under-hood” functions such as volume, brightness, and contrast adjustment.

Working Principle

The CT9EX202 trimmer potentiometer functions similarly to other memory elements, but with its added feature of a rotational limit switch. The device is usually mounted in either a through-hole or surface-mount circuit board. It is typically connected between two other devices in a circuit board, such as two terminals of a lithium ion battery.

The CT9EX202 is primarily a resistive element, and its resistance value is adjusted with a small rotational wheel affixed to its end. When the wheel is turned, the resistance value changes, and the output voltage delivered to the circuit is changed. The resistance value can be adjusted to a specific level with the rotational wheel, and then locked in place with the rotational limit switch. This feature makes the device especially suited for applications in which the same table setting and output voltage needs to be maintained.

The CT9EX202 trimmer potentiometer also features a wide resistance range, from 20 Ohms to 100,000 Ohms. This allows the device to be used for a wide variety of applications where a precise setting is needed. In addition, the device is designed for use in automotive equipment, making it ideal for many applications where it is necessary to adjust voltage, current, and resistance values.

Conclusion

The CT9EX202 trimmer potentiometer from STMicroelectronincs is a great choice for a variety of applications where reliable, repeatable resistance is needed. Its rotational limit switch and adjustable resistance value make it especially suitable for automotive duties that require precise voltage and current adjustment. Its wide resistance range also makes it ideal for a number of other applications where precise output voltage characteristics and repeatable adjustments are desired.

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