ST5TP203

Series:	ST5
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Obsolete
Moisture Sensitivity Level (MSL):	--
Resistance:	20 kOhms
Power (Watts):	0.25W, 1/4W
Tolerance:	±10%
Temperature Coefficient:	±100ppm/°C
Number of Turns:	14
Adjustment Type:	Side Adjustment
Resistive Material:	Cermet
Mounting Type:	Surface Mount
Termination Style:	Gull Wing
Size / Dimension:	Rectangular - 0.236" x 0.169" Face x 0.169" H (6.00mm x 4.30mm x 4.30mm)

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Trimmer Potentiometers: ST5TP203 Application Field and Working Principle

Trimmer Potentiometers (trim pots) are small, manually operated variable resistors which are used for calibration, adjustment, and fine tuning in electronic circuits due to their low price and compact size. They are often used in combination with a Voltage Divider or other circuit elements to adjust the output level and monitoring in a circuits power supply.​The ST5TP203 is a surface mount trim pot produced by STMicroelectronics which provides a low cost and relatively low power adjustable voltage or current source for a wide variety of applications.

Principle of Operation

The ST5TP203 trim pot consists of a resistor with two adjustable contacts which modify the resistance across the device. Applying a voltage across the resistor will cause a current to flow through it. By adjusting the two contacts, the resistance value can be modified and thus the current flow between the contacts. The adjustable contact is a thick-film resistor so the position of the contact can be maintained over time and temperature. The adjustable contact is typically biased to the middle of its range and so the current will automatically flow off in each direction with equal resistance. It is important to note that the maximum current rating of the trim pot should never be exceeded in order to protect the resistor from overheating and possible failure.

Applications of the ST5TP203 Trim Pot

The ST5TP203 trim pot is ideally suited for a wide variety of applications which require an adjustable voltage or current source. These applications include, but are not limited to:

• Amplifier Control – The ST5TP203 can be used to fine tune the voltage setting of an amplifier.
• Audio Volume Control – The adjustable contact on the trimpot can be used to adjust the volume of the audio signal in portable media players, home stereo systems, and other audio devices.
• Robotics – The trim pot can be used to adjust the speed of a motor or servo, allowing for precise control.
• Power Supply Regulation – The trim pot can be used to finely adjust the output voltage of a power supply to eliminate any over voltage or under voltage issues.
• Other – The adjustable contact on the ST5TP203 can be used for any application where a finely adjustable voltage or current source is needed.

Conclusion

The ST5TP203 trim pots is a Surface Mount Trim Pot produced by STMicroelectronics which provides a low cost and relatively low power adjustable voltage or current source for a wide variety of applications. The adjustable contact is a thick-film resistor so the position of the contact can be maintained over time and temperature. The ST5TP203 is ideally suited for applications such as amplifier control, audio volume control, robotics, power supply regulation, and other applications where a finely adjustable voltage or current source is needed.

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