BZV55-C5V1 Zener Diode 5.1V 500mW ±5% Surface Mount LLDS; MiniMelf 

Zener Diode Basic Operation and Applications

Zener Diode is a silicon semiconductor device that permits current to flow in either a forward or reverse direction. The diode consists of a special, heavily doped p-n junction, designed to conduct in the reverse direction when a certain specified voltage is reached.

The Zener diode has a well-defined reverse-breakdown voltage, at which it starts conducting current, and continues operating continuously in the reverse-bias mode without getting damaged. Additionally, the voltage drop across the diode remains constant over a wide range of voltages, a feature that makes Zener diodes suitable for use in voltage regulation.

Zener diode operation

The Zener diode operates just like the normal diode when in the forward-bias mode, and has a turn-on voltage of between 0.3 and 0.7 V. However, when connected in the reverse mode, which is usual in most of its applications, a small leakage current may flow. As the reverse voltage increases to the predetermined breakdown voltage (Vz), a current starts flowing through the diode. The current increases to a maximum, which is determined by the series resistor, after which it stabilizes and remains constant over a wide range of applied voltage.

BZV55-C5V1 Zener Diode 

General description
Low-power voltage regulator diodes in small hermetically sealed glass SOD80C
Surface-Mounted Device (SMD) packages. The diodes are available in the normalized
E24 ±2 % (BZV55-B) and approximately ±5 % (BZV55-C) tolerance range.
The series consists of 37 types with nominal working voltages from 2.4 V to 75 V.

Service

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Pls kindly check the below part number of same series.