GDZ4V7B-HE3-18

Series:	Automotive, AEC-Q101
Packaging:	Tape & Reel (TR)
Part Status:	Active
Voltage - Zener (Nom) (Vz):	4.7V
Tolerance:	±2%
Power - Max:	200mW
Impedance (Max) (Zzt):	100 Ohms
Current - Reverse Leakage @ Vr:	2µA @ 1V
Operating Temperature:	-55°C ~ 150°C
Mounting Type:	Surface Mount
Package / Case:	SC-76, SOD-323
Supplier Device Package:	SOD-323

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Introduction:

The GDZ4V7B-HE3-18 is a single diode chip and a member of the Zener diode family. It is an unidirectional device that allows current to flow in only one direction, typically from anode to cathode. GDZ4V7B-HE3-18 is used for a range of applications and its use is based on the working principle of Zener diodes. This article looks into the application fields and working principles of the GDZ4V7B-HE3-18.

Description:

The GDZ4V7B-HE3-18 is a very low-cost semiconductor device with a variety of applications. It can be used as a voltage regulator, surge protection, EMI filter, clipper, and temperature detector. It is a type of rectifying diode, characterized by a fixed based on its depletion layer width. This is sometimes called a reverse breakdown voltage, or Zener voltage. The GDZ4V7B-HE3-18 is available in an SOT-23 package and can operate at a temperature range of -55°C to 125°C.

Applications:

GDZ4V7B-HE3-18 is used as a voltage regulator in applications where it is desirable to have a precise voltage output. It uses the Zener effect to cause a particular voltage drop when there is a forward bias. With a forward current, the diode will maintain a specific voltage drop. This is called the Zener voltage and is used with a voltage regulator circuit to maintain a constant voltage across a load. This is useful in protecting sensitive electronic components which may be damaged when larger voltage fluctuations occur.GDZ4V7B-HE3-18 also has applications in surge protection. When an alternate voltage higher than the reverse breakdown voltage is applied, the reverse breakdown current pass through the diode and diverted to the ground. Therefore, the voltage applied to the device will not exceed the breakdown voltage, thus protecting it from any surge in power. GDZ4V7B-HE3-18 is also used as an EMI filter. In this case, the diode is inserted in series with the signal line and works on the capacitive effect of the diode. This way, the diode acts as a low pass filter, allowing only low frequency signals to pass while suppressing higher frequency noise signals. Finally, GDZ4V7B- HE3-18 can be used in a clipper circuit. A clipper circuit is used to eliminate the portions of a signal that extend above or below a certain voltage level. It is used to reduce the peak-to-peak voltage of an AC waveform and prevent it from exceeding the specified voltage. GDZ4V7B-HE3-18 is usually combined with a resistor-capacitor circuit to perform this task.

Working Principle:

The working principle of the GDZ4V7B-HE3-18 is based on the Zener effect, which is a phenomenon in which the resistance of a semiconductor decreases when a certain level of reverse bias voltage is applied. This phenomenon was discovered by Clarence Zener in 1934, and hence the Zener diode is named after him. When a reverse bias voltage is applied to the diode, the depletion region extends and the width of the barrier formed is reduced. This reduces the effective resistance at the junction. When a certain reverse bias voltage is reached, the diode becomes conductive, thus allowing a large amount of current to pass through it. When a Zener diode is placed in series with a load and a forward significant current is passed though the circuit, the Zener diode will maintain a steady Zener voltage across the load. This is accomplished by adjusting the forward current through the Zener diode. No matter how much the voltage changes, the Zener diode will keep the voltage across the load constant.

Conclusion:

In conclusion, the GDZ4V7B-HE3-18 is a single diode chip and a member of the Zener diode family. It is used for a range of applications based on the working principle of Zener diodes. It can be used as a voltage regulator, surge protection, EMI filter, clipper, and temperature detector. The working principle of the GDZ4V7B-HE3-18 is based on the Zener effect, which is a phenomenon in which the resistance of a semiconductor decreases when a certain level of reverse bias voltage is applied. This phenomenon was discovered by Clarence Zener in 1934, and hence the Zener diode is named after him.

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