SMZG3802B-M3/5B

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SMZG3802B-M3/5B is a kind of diode within the category of single zener diode, with a wide range of application fields. It is a two-leaded, 3.8V, 0.2 Watt enclosed low leakage current, capable of withstanding transient high surge current. When used as a voltage reference diode, it also offers exceptionally tight limits on the current noise and voltage variations.

Features

• Low leakage current
• Low voltage reference variations
• Low current noise
• High surge current capability
• High stability
• Enclosed package

Applications

• Voltage regulator and controlled supply designs
• Zener reference/stabilizer
• Bipolar/CMOS logic noise suppression
• General purpose AC/DC protection circuits
• Clipping/clamping circuits
• DC–DC switching converters
• Signal/waveform purification.

Working Principle

A Zener Diode is a type of rectifying semiconductor diode, providing unidirectional conduction when the forward-biased p-n junction formation reaches its avalanche voltage (or simply \'Zener voltage\'). This voltage occurs the n-side semiconductor junction is capable enough to resist and breakdown the reverse biasing electric field.

In case of SMZG3802B-M3/5B, the breakdown voltage is designed to be 3.8V and the power dissipation is 0.2 Watt. It works based on Zener effect, which increases the breakdown voltage a few more volts when compared to regular PN junction. When the rated voltage is applied to the diode, the circuit continues to supply the current until it reaches the rated value and it does not draw any additional current beyond that. This is conducted with the help of excess energy that is created when static electric fields break down.

Conclusion

SMZG3802B-M3/5B is a single zener diode offering various advantages such as low leakage current, low voltage reference variations, low current noise and excellent stability. It is capable of withstanding transient high surge current. It can be used for various applications, such as voltage regulator, DC-DC converters, signal/waveform purification, and so on. It works based on the Zener effect, providing unidirectional conduction when the forward-biased p-n junction formation reaches its avalanche voltage.

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