CDZT2R12B

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The CDZT2R12B is a single Zener diode which results in a breakdown voltage of 12 volts and a power dissipation rating of 500 mW (1/2 Watt). This diode is ideal for precision applications, requiring features such as low noise and low leakage current, as well as higher reverse voltage breakdown ratings. It is available in SOD-123FL and SOT-23 packages, making it very easy to use in a variety of industrial applications.

Applications of CDZT2R12B

The CDZT2R12B has a wide application range that includes applications in consumer electronics, automotive, telecommunications, avionics and industrial, due to its great capability to handle precision applications. Examples of applications that it is suitable for include:

• as a clamping device for suppressing transients at the input and output terminals of power supplies,
• as primary protection for analog and digital circuits connected to the AC mains to prevent damage due to excessive voltage,
• as voltage reference for regulating negative supplies in power management systems,
• for voltage division in LED systems,
• for clamping and snubbing circuits in electronic switches and motors,
• as protection in ESD environments.

Working Principle of CDZT2R12B

The CDZT2R12B is a Zener diode, meaning that it works in the reverse or breakdown region of its characteristic curve. The principle of the Zener diode is based on the fact that when the voltage across it is increased, electrons are pulled from the valence band to the conduction band, thus creating more free electrons that conduct current. The point at which this happens is referred to as the breakdown voltage of the diode.

When the diode is reversed biased, the reverse leakage current is relatively small until the breakdown voltage is reached and the current then rises rapidly. The reverse-breakdown voltage of the CDZT2R12B is 12 volts, making it suitable for use in precision applications.

The CDZT2R12B is also very effective in ESD applications due to its excellent clamping action. This diode has very low leakage current and is capable of handling up to 400 volts per microseconds ESD pulses.

Advantages and Drawbacks of CDZT2R12B

The CDZT2R12B, being a precision device, offers several advantages over other types of diodes. As previously mentioned, it has a breakdown voltage of 12 volts and can handle up to 400 volts per microsecond of ESD pulses. This makes it suitable for use in a variety of precision applications where protection from high voltage transients and surges is required. In addition, it is packaged in two small packages, making it cost-effective and easy to use.

One of the drawbacks of the CDZT2R12B is that it is not suitable for high voltage applications. At higher voltages, it can conduct excessively, resulting in damage to the device. In addition, it is not suitable for high-speed switching applications due to its relatively slow response time.

Conclusion

In conclusion, the CDZT2R12B is a precision Zener diode with a breakdown voltage of 12 volts and a power dissipation rating of 500 mW (1/2 Watt). Due to its excellent clamping action, low leakage current and small size, the CDZT2R12B is ideal for precision applications in consumer electronics, automotive, telecommunications, avionics and industrial. While it is suitable for precision applications, it has limited use in high voltage applications.

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