AOZ8212BCI-12 Circuit Protection

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AOZ8212BCI-12 TVS - Diodes Application Field and Working Principle

Transient Voltage Suppression (TVS) diodes, also known as surge protection diodes, are designed to protect electronic components and systems from the damaging effects of transient overvoltage. The AOZ8212BCI-12 is a bidirectional (bi-directional) TVS diode, ideal for protection against overvoltages and high current surges.

Application Field:

The AOZ8212BCI-12 is designed for use in a wide variety of applications, including automotive, industrial, consumer, and medical electronics. It is commonly used for protection against electrostatic discharge (ESD) and high-energy transients from lightning strikes, power cross, and other sources. It is able to protect the components and systems from damage caused by these transients by clamping their voltage to a safe level, as well as providing a low-impedance path for current to flow away from the protected area.

Working Principle:

The AOZ8212BCI-12 TVS diode operates by connecting two diodes back to back, with each diode biased in the reverse direction. In normal conditions when the voltage across the diode is below the breakdown voltage, the device is reverse-biased and behaves as an open circuit. When a voltage over the breakdown voltage is applied, the diode is forward biased and creates a low-impedance path from the anode to cathode, allowing current to flow. This action clamps the voltage across the device and protects the circuit from transients.

The AOZ8212BCI-12 also includes a built-in steering diode, which helps to limit current flow in the reverse direction by providing an alternative current path. This feature allows the AOZ8212BCI-12 to protect both AC and DC components.

Conclusion:

The AOZ8212BCI-12 is a widely-used TVS diode that provides reliable protection against overvoltages and high energy transients. Its bi-directional design makes it suitable for both AC and DC applications, and its built-in steering diode further helps to protect components by providing an alternative current path.

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