BZG04-30-HM3-18

Series:	Automotive, AEC-Q101, BZG04-M
Packaging:	Tape & Reel (TR)
Part Status:	Active
Voltage - Zener (Nom) (Vz):	36V
Tolerance:	--
Power - Max:	1.25W
Current - Reverse Leakage @ Vr:	5µA @ 30V
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

A BZG04-30-HM3-18 Diode, also known as a Zener Single Diode, is a semiconductor device that is designed to regulate the flow of current in a circuit by limiting the voltage applied across a device. It is commonly used in many different applications including power supplies, voltage regulators, surge protectors and voltage references.

Operation Principle

The operation principle of a BZG04-30-HM3-18 Diode is based on its reverse-bias junction characteristics. The reverse-bias junction of the diode is designed to easily breakdown when the voltage applied across it exceeds a certain level. This breakdown of the junction is known as Zener breakdown and is the basis of the operation of the device.When the voltage applied across the junction exceeds the breakdown voltage, the diode begins to conduct current in the reverse-bias direction. This current is known as the Zener current and it is this current that is used to regulate the flow of current in the circuit.When the voltage across the diode drops below the Zener voltage, the diode becomes an open circuit, meaning that current cannot flow in either direction. This ensures that the voltage applied across the device is kept at a steady level and does not exceed the Zener voltage.

Applications

BZG04-30-HM3-18 Diodes are widely used in a range of applications where voltage regulation is necessary. The most common applications for these diodes include voltage regulators for power supplies, surge protectors for sensitive electronics and voltage references for precision circuits.

Power Supply Voltage Regulation

A BZG04-30-HM3-18 Diode can be used to regulate the voltage applied to a power supply. By connecting a Zener diode inline with the power supply, the maximum voltage across the power supply can be precisely regulated. This ensures that no component connected to the power supply is exposed to excess voltage and that the regulated voltage is consistent.

Surge Protection

BZG04-30-HM3-18 Diodes can also be used to protect sensitive electronic components from surges in voltage by providing an effective short-circuit path when the voltage increases beyond a certain level.When the voltage increases beyond the Zener voltage of the diode, the diode will alter its forward-biased characteristics to become a low-resistance path for the excess voltage, dissipating the voltage over the diode and protecting the component.

Voltage References

Finally, Zener diodes can also be used in precision circuits to ensure that the voltage across the component is kept at a steady level. By connecting a Zener diode in reverse-bias across the component, the voltage across the component is limited to the Zener voltage of the diode, ensuring that the output voltage is always within a predictable range.

Conclusion

The versatile BZG04-30-HM3-18 Diode can be used in a range of applications to regulate the flow of current in a circuit. The device works by limiting the voltage applied across it and is most commonly used in voltage regulation, surge protection and voltage references applications.

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