BZG05C20-HM3-18

Series:	Automotive, AEC-Q101, BZG05C-M
Packaging:	Tape & Reel (TR)
Part Status:	Active
Voltage - Zener (Nom) (Vz):	20V
Tolerance:	±6%
Power - Max:	1.25W
Impedance (Max) (Zzt):	24 Ohms
Current - Reverse Leakage @ Vr:	500nA @ 15V
Voltage - Forward (Vf) (Max) @ If:	1.2V @ 200mA
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 BZG05C20-HM3-18 is a Zener diode in a SOT-23 package commonly used in a wide range of applications. It is a single diode made of semiconductor materials and designed with a variety of features that allow it to be used as a voltage regulating device. With its ability to regulate voltage, it can be used to prevent overvoltage or short circuits as well as to protect sensitive electronic devices from voltage spikes. In addition, it has a low capacitance, which makes it suitable for use in high-frequency electronics.

Application Field

The BZG05C20-HM3-18 Zener diode is commonly used in many electronics projects, including protection circuits and voltage regulators. In protection circuits, it is used to protect sensitive components from power surges or other voltage spikes, as well as to prevent over-voltage or short circuits. It can also be used in voltage regulators, which work by controlling the output voltage of a power supply. This can be done by adjusting the current flowing through the diode, thereby providing a stable, regulated output voltage. The BZG05C20-HM3-18 can also be used to create a voltage-controlled threshold, which is commonly used in digital circuitry to detect the level of a digital signal.

Working Principle

The BZG05C20-HM3-18 Zener diode works on the principle of "resistance breakdown." This means that when the voltage applied to the external terminals of the diode exceeds the Zener voltage, the resistance of the diode decreases, allowing a greater current to flow through it. This current will also cause the voltage across the diode to become nearly equal to the Zener voltage. This is known as "Zener breakdown" and is the principle on which the BZG05C20-HM3-18 operates.The Zener voltage, or Zener breakdown voltage, of the BZG05C20-HM3-18 is rated at 18 volts, which means that the voltage at the external terminals must exceed 18 volts before it will begin conducting. Once it begins operating, the voltage across the diode will be nearly equal to the Zener voltage, even if the voltage at the external terminals increases further. This ensures that the voltage at the output remains stable and regulated.

Conclusion

The BZG05C20-HM3-18 Zener diode is a single diode used for a wide range of applications, including protection circuits and voltage regulators. It is constructed from semiconductor materials and works on the principle of resistance breakdown. When the voltage applied to the external terminals of the diode exceeds the Zener voltage of 18 volts, the resistance of the diode decreases, allowing a greater amount of current to flow through it. This current causes the voltage across the diode to become nearly equal to the Zener voltage and helps regulate the output voltage of a power supply.

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