Diodes - Zener - Single

The MMBZ4687-E3-18 is a single Zener diode designed for use in various electronic applications. This diode is a three pin device, with a maximum forward voltage of 3.6V, and a reverse breakdown voltage of 18V, making it ideal for use in applications requiring a high voltage level such as power supplies and voltage regulators.

Overview

A Zener diode is a type of diode that has a reverse-bias breakdown voltage more than their normal forward voltage. When connected in reverse, a Zener diode will allow current to pass through it when there is a voltage of equal or greater magnitude applied on its forward side. This feature is useful in many applications as it helps to regulate voltage levels in a circuit. Zener diodes can be used in series or in parallel with other components to regulate the voltage levels, or as a voltage reference source.

Applications

The MMBZ4687-E3-18 diode can be used in a variety of electronic applications where a high voltage is required. It can be used for voltage regulation, in power supplies for charger applications, and for voltage clamping. It can also be used for level shifting, or as a reference voltage source. It can also be used for motor drive and protection applications, as well as for noise suppression.

Working Principle

When the anode of a Zener diode is connected to the positive side of a power source and the negative side is connected to the cathode, current will flow until the voltage across the diode reaches its rated reverse breakdown voltage. Once the diode begins to conduct, it is said to be in its “Zener region” and a voltage equal to its rated reverse breakdown voltage will appear across its pins. This voltage is referred to as the “Zener voltage”. The Zener voltage is constant regardless of the total amount of current passing through the diode.

The MMBZ4687-E3-18 is designed to operate in the Zener region with a reverse breakdown voltage of 18V. If a higher voltage is applied to its anode, the voltage across the diode will be clamped at 18V. This property is very useful for voltage regulation and for protecting other components from being damaged by excessive voltages.

Conclusion

The MMBZ4687-E3-18 Zener diode is a three pin device designed for use in a variety of electronic applications. It has a maximum forward voltage of 3.6V, and a reverse breakdown voltage of 18V. This diode can be used for voltage regulation, voltage clamping, level shifting, and as a reference voltage source. It is also useful for motor drive and protection, as well as for noise suppression applications. By understanding the working principle of the MMBZ4687-E3-18 Zener diode, engineers and technicians can design efficient and reliable circuits that can withstand high voltages.