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Diodes - Zener - Single

The BZX84J-C39, 115 Zener Diode, manufactured by NXP Semiconductors, belongs to the single diode family of Zeners, which are designed to function as a voltage regulator, providing a reference voltage in circuits where there is a need to regulate a particular level of voltage. It is a two-terminal device with a low temperature coefficient and a stable voltage regulation over a wide range of conditions. This Zener Diode is capable of handling a maximum of 500 milliamps of current, and its maximum reverse voltage is 115 volts.

Applications

This semiconductor device is primarily used for voltage regulation and noise suppression when employed in test and measurement equipment, automotive and industrial applications. It is also used in driver circuits, overvoltage and crowbar protection, and LPRFS (low power RF switch) configurations. They are also used in a variety of sensors, PC cards, peripheral devices, power management and portable audio applications.

Working Principle Of Zener Diode

The Zener diode works under a reverse bias, which means it has a negative voltage applied to the cathode and a positive voltage applied to the anode. This creates an electric field within the Zener diode, called a depletion region. The depletion region allows current to flow through the diode, but it also acts as a voltage regulator. When the voltage or current applied to the diode exceeds its breakdown voltage (or zener voltage), the current will start to flow through the diode. The zener voltage effectively sets a limit on how far the voltage can exceed, which is why it is used to regulate the output of a circuit.

When the electric field across the Zener diode increases, the amount of current the diode can handle also increases. This is why the BZX84J-C39, 115 Zener diode has a maximum current of 500mA. As the maximum current is reached, the zener voltage starts to drop. This is because as the current through the diode increases, so does the temperature of the diode. When the temperature of the diode inhibits the electric field across the diode, it begins to dissipate some of the current, which lowers the zener voltage.

Conclusion

The BZX84J-C39, 115 Zener Diode is a two-terminal semiconductor device used for voltage regulation and noise suppression. Its voltage regulation is stable over a wide range of conditions, and it is capable of handling currents up to 500 milliamps. It is primarily used in electronic circuits for voltage regulation, overvoltage protection, and other applications. The Zener diode works under a reverse bias and functions by limiting the amount of electric field across it. As the electric field increases, the current that the diode can handle increases until it reaches its maximum current rating. This diode is an important component in a variety of electronic circuits, and its use is invaluable in the electronics industry.

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