Series:	Automotive, AEC-Q101, BZG03C-M
Packaging:	Tape & Reel (TR)
Part Status:	Active
Voltage - Zener (Nom) (Vz):	18V
Tolerance:	±6.39%
Power - Max:	1.25W
Impedance (Max) (Zzt):	15 Ohms
Current - Reverse Leakage @ Vr:	1µA @ 13V
Voltage - Forward (Vf) (Max) @ If:	1.2V @ 500mA
Operating Temperature:	150°C (TJ)
Mounting Type:	Surface Mount
Package / Case:	DO-214AC, SMA
Supplier Device Package:	DO-214AC (SMA)

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Introduction

The BZG03C18-HM3-18 is a diode that can be classified as a single Zener diode. A Zener diode is a component that provides a fixed voltage output in applications where a voltage boost or droop is required. This type of diode is incredibly versatile and has a wide range of uses in electronic devices. It is often used to provide decoupling, act as a voltage reference, or to provide an active load that regulates current.

Application Field

The applications of the BZG03C18-HM3-18 are numerous. It is often used as a reference device in AC/DC power supplies, RF power amplifiers, and voltage regulators. It can also be used for rectification, voltage division, Zener voltage regulation, and voltage clamping. In medical applications, Zener diodes are used to regulate the voltage across sensitive circuits by shunt regulation. Zener diodes can easily be incorporated into integrated circuits (ICs) and are used in memory and logic boards.

Working Principle

The BZG03C18-HM3-18 is a single Zener diode, meaning that it has a single p-n junction. The junction of the diode\'s p-type and n-type semiconductor material behaves like any other diode, allowing current to flow in only one direction. However, when the diode is reverse-biased to a voltage that is above a certain threshold (the Zener voltage), current can flow in the opposite direction as well. This is called Zener breakdown and is the basis of a Zener diode\'s operation. When the forward voltage is applied to the diode, the junction behaves like a normal diode and current only flows in one direction. However, when the reverse bias voltage (Vz) reaches the breakdown voltage of the diode, current begins to flow in the opposite direction. This current flow is due to thermionic emission, which occurs when electrons in the p-n junction gain enough kinetic energy to jump across the junction and enter the n-type material. The Zener diode can be used to provide a fixed voltage output in applications where a voltage drop or boost is needed. After the Zener breakdown, any variation in the input voltage will not significantly affect the output voltage, as the Zener diode will regulate it and provide a constant output. It is this property that makes the BZG03C18-HM3-18 a popular choice for applications requiring a stable voltage output.

Conclusion

The BZG03C18-HM3-18 is a single Zener diode that provides a fixed voltage output in applications where a voltage boost or droop is required. It is used in AC/DC power supplies, RF power amplifiers, voltage regulators, rectification, and voltage clamping. Additionally, it can be incorporated into integrated circuits and is often used in memory and logic boards. The Zener diode works by regulating a reverse bias voltage until it passes the breakdown voltage, at which point current can flow in the opposite direction. This basic principle is the basis of the versatile BZG03C18-HM3-18, making it a popular choice for applications requiring a stable voltage output.

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