GDZ3V3B-HG3-18

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Diodes - Zener - Single : Application Field and Working Principle

A Zener diode is a two-terminal electronic component with an intrinsic rectifying junction that can conduct current in either direction, allowing it to be used as a stabilizing element. As a single diode, it has the unique property of exhibiting a sharp breakdown voltage when a forward-bias voltage is applied. This breakdown voltage, known as the Zener voltage, is the voltage at which the diode begins to conduct in the reverse-bias direction and the diode is completely depleted, allowing a large current to flow through it. The Zener voltage is typically determined by doping, increasing the doping with increasing Zener voltage.The GDZ3V3B-HG3-18 Zener diode is a single diode designed for use across a wide range of applications where rugged and reliable operation is paramount. With its sharp breakdown voltage, this diode is particularly suitable for use in high-frequency, high-voltage circuits, making it ideally suited for use in power supplies, lighting ballasts, and other electrical and electronic equipment.The GDZ3V3B-HG3-18’s Working PrincipleThe diode works on the principle of reversed biased breakdown, where a small reversal bias voltage is applied to the diode. As the voltage increases across the diode, it begins to conduct in the reverse direction and the diode becomes completely depleted. At this point, a large amount of current begins to flow through the diode as its breakdown voltage is reached.The rated Zener voltage of the GDZ3V3B-HG3-18 is precisely determined by its doping process, allowing it to provide a very low leakage current when reverse biasing, making it highly suited to power supply circuits and other high-reliability applications. The diode also has a relatively low dynamic resistance, ensuring excellent performance and providing higher stability over temperature.Applications of the GDZ3V3B-HG3-18Due to its sharp breakdown voltage and reliable operation, the GDZ3V3B-HG3-18 is well suited for use in a wide-range of applications. These applications include:• Lighting ballasts – The low voltage requirements of a lighting ballast make the GDZ3V3B-HG3-18 an ideal choice for this application. The diode’s low dynamic resistance allows for more accurate control of the supply voltage, ensuring a reliable and consistent light output.• Power supplies – given the diode’s low leakage current, the GDZ3V3B-HG3-18 is a perfect choice for power supplies. The diode’s reliable behaviour ensures continuity of service, allowing the supply to remain online even when subjected to extreme variations in load conditions.• Bipolar junction transistors – The GDZ3V3B-HG3-18 can be used to protect bipolar junction transistors by taking the brunt of any reverse biasing voltage, allowing the BJT to remain in its active region of operation.ConclusionThe GDZ3V3B-HG3-18 is a single diode designed for use across a wide-range of applications where rugged and reliable operation is paramount. Its sharp breakdown voltage and low dynamic resistance makes it ideal for use in high-frequency, high-voltage circuits, making it particularly suited for power supplies and lighting ballasts, as well as in bipolar junction transistors for protection.

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