BZX79C4V7

Series:	--
Packaging:	Bulk
Part Status:	Active
Voltage - Zener (Nom) (Vz):	4.7V
Tolerance:	±5%
Power - Max:	500mW
Impedance (Max) (Zzt):	80 Ohms
Current - Reverse Leakage @ Vr:	3µA @ 2V
Voltage - Forward (Vf) (Max) @ If:	1.5V @ 100mA
Operating Temperature:	-65°C ~ 200°C
Mounting Type:	Through Hole
Package / Case:	DO-204AH, DO-35, Axial
Supplier Device Package:	DO-35
Base Part Number:	BZX79C4V7

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BZX79C4V7 Application Field and Working Principle

Introduction

The BZX79C4V7 Zener diode is a single diode designed with a reverse breakdown of 4 volts in many electronic circuits. These diodes are commonly used to regulate and stabilize voltages in electronic applications such as power supplies, amplifiers, and regulators. They are often used in low voltage applications and have a moderate power handling capability. This article will discuss the application field of the BZX79C4V7 Zener diode and its working principle.

Application Field

As mentioned above, BZX79C4V7 Zener diodes are frequently used in power supplies. They are utilized to regulate incoming voltage, lowering it to the desired value. This is especially useful for electronic devices with varying power supply voltages, such as laptop computers and cellphones. Additionally, the BZX79C4V7 can be used to ripple-clip high-voltage spikes, protecting against voltage transients.The BZX79C4V7 Zener diode is also widely used in audio amplifiers to provide an adjustable DC reference. As an example, when an AC signal is passed through a diode network, an output current is generated. If one of the diodes is a BZX79C4V7 Zener diode, it will limit the voltage to 4V and prevent distortion.

Working Principle

The BZX79C4V7 Zener diode is based on the principle of a p-n junction diode. As a result, it has a reverse breakdown voltage of 4 volts. This means that when the reverse voltage applied to the diode exceeds 4 volts, the diode will break down and allow current to pass in the opposite direction. The amount of current that can pass through the diode is limited by series resistor Rz.In an ideal case, when a voltage greater than 4 volts is applied to the diode, the device will regulate the output voltage to exactly 4 volts with no ripple or distortion. However, in reality, Zener diodes have tolerance (+/-5%) and the output voltage is not a precise 4 volts. As the current drawn through the diode increases, the output voltage will drop linearly.

Conclusion

The BZX79C4V7 Zener diode is a single diode designed to regulate and stabilize voltages in electronic applications such as power supplies, amplifiers, and regulators. The diode is based on the principle of a p-n junction diode and has a reverse breakdown voltage of 4 volts. This makes the BZX79C4V7 Zener diode an ideal choice for applications that require a steady output voltage.

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