DF5A3.3FU(TE85L,F) Circuit Protection

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DF5A3.3FU(TE85L,F) is one of the most frequently used TVS diodes, featuring low leakage current, low capacitance, and fast response time. It is used in wide range of applications, from consumer electronics, intermediate power supplies, to automotive and aerospace industries. In this article, we will discuss its application field and working principle.

Application Field

DF5A3.3FU(TE85L,F) is mainly used in consumer electronics such as computers, DVD players, monitors, televisions, and other home entertainment systems. It is also used in intermediate power supplies of industrial, medical, automotive or aerospace systems. It can be used to protect circuits and components from high voltage transients resulting from lightning, electromagnetic interference (EMI), electrostatic discharge (ESD), and static electricity produced by humans.

Working Principle

DF5A3.3FU(TE85L,F) is basically an avalanche diode, also called a TVS or transient voltage suppression diode. It is a zener diode with a special protective coating to protect against transient voltage spikes. It works by absorbing the energy of a spike and dissipating it as heat. When a transient voltage spike is applied to the diode, its junction breaks down and it conducts. The energy of the spike is then absorbed and dissipated as heat. This allows the protected circuit to remain protected from any voltages exceeding its specified level.

DF5A3.3FU(TE85L,F) also features a thermal shutdown mechanism that is designed to protect it from overheating. As the diode absorbs spikes, its temperature rises. As the temperature rises, it causes the device to enter a thermal shutdown state. This state reduces the current it can pass safely and prevents it from being damaged by overheating.

Conclusion

DF5A3.3FU(TE85L,F) is an important component in different types of applications. It is used to protect circuits and components from high voltage transients resulting from lightning, electromagnetic interference (EMI), electrostatic discharge (ESD), and static electricity produced by humans. It is an invaluable device due to its low leakage current, low capacitance, and fast response time. It also includes a thermal shutdown mechanism to prevent it from overheating.

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