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Diodes - Zener - Single

A single Zener diode is classified by its Zener voltage. PZU8.2B3,115 is the type of Zener diode specified by the user, with a Zener voltage of 8.2V and a breakdown voltage of 10V. This is a low-cost, highly reliable Zener diode designed to melt down at its specified breakdown voltage, so that it can safely divert more current into the circuit during surge protection.

Application Field

Frequent applications of PZU8.2B3,115 include overvoltage protection against surge voltages, reverse bias protection in power supplies, and dynamic stability in digital logic circuits. This Zener diode is also suitable for use in voltage regulation applications and as an input protection device for industrial process control equipment. Additionally, PZU8.2B3,115 is used in V-I convertors, battery charger circuits, flyback circuits and switching power supplies, where it is necessary to precisely regulate and limit the output voltage.

Working Principle

The PZU8.2B3,115 Zener diode works on the principle of avalanche breakdown mechanism. Here, when a reverse bias is applied on the diode with a voltage greater than the specified breakdown voltage of 10V, the insulation of the P type and N type regions breaks down and a large number of free electrons and holes are generated. This free electron-hole pair accelerates and acquires sufficient energy to cause further breakdown, which results in a sudden rise in current and voltage. The Zener diode in turn, limits the current flow and restrict the voltage across the diode to a predetermined and stable level.

When the Zener diode is functioning as the voltage regulator, a series current limiting resistor should be connected in series in order to protect the diode. The value of the series current limiting resistor can be determined by thefollowing formula: R = (Vsupply voltage - Vzener voltage) / Izener current.

In addition to its use in voltage regulation circuits, PZU8.2B3,115 can also be used in other applications such as voltage reference sources, current limiting and body diode applications.

Advantages

The PZU8.2B3,115 Zener diode has numerous benefits. It offers low power consumption and low thermal resistance, allowing it to operate in high temperature environments. The diode also has a high reverse breakdown voltage and a low forward voltage drop. In addition, this Zener diode features an ultra-low Zener impedance, enabling it to effectively shunt sudden voltage surges for improved system reliability.

Conclusion

PZU8.2B3,115 is a single Zener diode specially designed for surge protection applications. Due to its high breakdown voltage and low forward voltage drop, this diode can effectively divert excess current when the voltage surpasses the specified threshold. This Zener diode is also suitable for use in voltage regulation applications and offers numerous advantages, such as low power consumption and high temperature resistance. Therefore, the PZU8.2B3,115 is an ideal choice for various electronic circuit protection applications.

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