ST7EA500

Series:	ST7
Packaging:	Bulk
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Resistance:	50 Ohms
Power (Watts):	0.25W, 1/4W
Tolerance:	±20%
Temperature Coefficient:	±250ppm/°C
Number of Turns:	3
Adjustment Type:	Top Adjustment
Resistive Material:	Cermet
Mounting Type:	Surface Mount
Termination Style:	J Lead
Size / Dimension:	Rectangular - 0.252" x 0.240" Face x 0.134" H (6.40mm x 6.10mm x 3.40mm)

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Trimmer Potentiometers: ST7EA500 Application Field and Working Principle

Trimmer potentiometers are a type of adjustable resistor used to fine-tune electrical circuits. The ST7EA500 trimmer potentiometer is a single-turn device featuring a thin-film design with higher voltage withstand capability and excellent long-term stability. This trimmer is suitable for use in surface-mount, embedded or panel-mounted applications.

Types of Trimmer Potentiometers

Trimmer potentiometers come in three types: rotary, slide, and multi-turn. The ST7EA500 is a single-turn rotary device. Rotary trimmer potentiometers are used to adjust resistance in applications where precise resistance values are needed. This type of trimmer has a shaft with an attached element that rotates within the package. Resistance value may be adjusted by turning the shaft of the trimmer.

ST7EA500 Application Field

The ST7EA500 trimmer potentiometer is designed to operate in the low voltage range of 0 to 16 Volts, with a minimum resistance of 500 ohms. It is commonly used in audio applications where low noise is of paramount importance, as well as mobile communication, industrial instrumentation, automotive, and medical electronics. Its superior noise characteristics offer improved frequency response and better signal performance than standard trimmer potentiometers.

ST7EA500 Working Principle

The ST7EA500 trimmer potentiometer is composed of a ceramic substrate, electrodes, and a conductive film. The electrodes are connected to two terminals on the PCB, while the conductive film is connected to the shaft. When the shaft is rotated, a varying amount of resistance is created between the two terminals. This allows for fine adjustment in circuits. Some designs also incorporate additional ceramic layers, known as “cushions,” to dampen the effects of over-turning.

Conclusion

The ST7EA500 trimmer potentiometer is a single-turn device featuring a thin-film design with superior noise characteristics and long-term stability. It is suitable for use in a variety of different applications, such as audio processing, mobile communication, industrial instrumentation, automotive, and medical electronics. When in operation, the trimmer produces varying levels of resistance from the two terminals connected to it, allowing for fine adjustments in circuits.

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