SZMMSZ4690ET3G

Diodes are one of the most important components in many electronics circuits, offering various circuit protection functions and signal routing capabilities. Zener diodes are special types of diodes which operate using the Zener effect, and the SZMMSZ4690ET3G is a single Zener diode built for general-purpose usage. This diode can handle up to 4.7V of forward voltage and 900mA of forward current, with a maximum peak reverse power dissipation of 500mW.

Application Fields

Zener diodes like the SZMMSZ4690ET3G are essential components in both analog and digital circuits. They are used as voltage references which maintain a stable output voltage in spite of variation in the source voltage and load, and thereby protect delicate components from overvoltage. They are also used to provide regulation to power supplies, and to protect the outputs of circuits in general-purpose applications.

Working Principle

Zener diodes operate using the Zener effect, which occurs when a reverse-biased p-n junction sustained beyond its breakdown voltage. When the reverse voltage applied to a Zener diode exceeds its Zener voltage, carriers of both types will be accelerated in opposite directions across the depletion region and recombine, releasing energy in the form of photons. This process is known as a Zener breakdown, and the current regulated through the diode will allow it to retain its Zener voltage.

Conclusion

The SZMMSZ4690ET3G is a widely-used single Zener diode due to its versatility in various applications. Its abilities to regulate current and protect components from overvoltage make it an essential part of many circuits. Its working principle, while simple, still produces reliable and consistent results.