PDZ3.9BZ

Introduction

PDZ3.9BZ is a single zener diode which is widely used in various applications. This diode is specially designed for use in linear regulator applications and for protection circuits. This diode exhibits a low forward voltage drop, low dynamic impedance and excellent surge handling capability. It is capable of handling up to 600 volts peak reverse voltage (VRRM) and nominally marketed with a maximum reverse breakdown voltage of 3.9 volts.

Application Field

The PDZ3.9BZ is mainly used in the following three applications:

• In linear regulator applications, such as adjustable voltage regulators, voltage reference circuits, and power converters.
• In protection circuits, such as over-voltage protection circuits, in-rush current limiters, and reverse polarity protection circuits.
• In other various applications, such as warning and stopping circuits, timing control circuits and test equipment.

Working Principle

The PDZ3.9BZ zener diode is a two-terminal semiconductor device that operates in the reverse breakdown region. When subjected to a reverse voltage that exceeds the breakdown voltage, a low resistance conduction path is established. The current through the diode is regulated by the voltage drop at the reverse breakdown voltage. This results in the corresponding voltage across the terminals of the device remaining constant, while the current increases linearly with an increase in the applied reverse voltage.

Conclusion

The PDZ3.9BZ is a single zener diode widely used in various applications. It is mainly used in linear regulator, protection circuitry and other various applications. This diode operates in the reverse breakdown region, and has a low forward voltage drop, low dynamic impedance, and excellent surge handling capability. As such, it is an excellent choice for applications where low voltage regulation and surge protection is needed.