BZT52C20-HE3-08

Series:	Automotive, AEC-Q101
Packaging:	Tape & Reel (TR)
Part Status:	Active
Voltage - Zener (Nom) (Vz):	20V
Tolerance:	±5%
Power - Max:	410mW
Impedance (Max) (Zzt):	20 Ohms
Current - Reverse Leakage @ Vr:	100nA @ 15V
Operating Temperature:	-55°C ~ 150°C
Mounting Type:	Surface Mount
Package / Case:	SOD-123
Supplier Device Package:	SOD-123

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Introduction

BZT52C20-HE3-08 is a single zener diode, most commonly used for voltage regulation, electrical protection, and static switching. Typically, a zener diode works by permitting current to flow in either direction when the voltage across it is below the breakdown voltage known as the “zener voltage”. When the voltage of the external circuit rises above the specified breakdown voltage, the current in the diode is limited to a certain amount of DC current, depending on the configuration of the diode. This is a beneficial characteristic since the current is regulated even as the voltage fluctuates, helping to protect the circuit from an overvoltage surge or no-load condition.

Features

The BZT52C20-HE3-08 features an excellent thermal stability and low power consumption. The maximum power that can be handled by the diode is approximately 500mW. It also has a relatively low thermal resistance of 1.6°C/W. The BZT52C20-HE3-08 is available in a compact SOD123 package and is capable of handling 20V maximum breakdown voltage.

Typical Application Fields

The main application of the BZT52C20-HE3-08 is in voltage regulation, electric protection, and static switching. Its most common uses include:• Industrial Automotive• Power Supply Circuits• Electronic Equipment• Telecommunications• computer motherboards• electrical appliance• signal protectionIn addition, the BZT52C20-HE3-08 can be used in opto-electronic or audio-video applications to reduce signal interference in order to protect the circuit from being damaged by unexpected changes in voltage.

Working Principle

BZT52C20-HE3-08 is a single zener diode, which works by allowing current to flow in either direction when the voltage across it is below the breakdown voltage known as the “zener voltage.” It works by utilizing a voltage breakdown phenomenon in its reverse-biased junction which allows a certain level of current to pass regardless of the external voltage. The current-voltage (I-V) characteristic of the diode is unique: when the voltage across the diode is increased, the current flowing through the diode is limited to a certain amount, regardless of the extent of the increase in voltage. This feature is advantageous when it comes to protecting the circuit from overvoltage surges or no-load conditions.When the diode is in the forward-biased state, the current varies exponentially with respect to the voltage. On the contrary, when the diode is reverse-biased, the zener voltage remains constant and the current-voltage (I-V) curve appears to be a straight line. This behavior is known as the Zener breakdown effect, and it is what allows the diode to regulate the voltage.

Conclusion

The BZT52C20-HE3-08 is a single zener diode that is commonly used for voltage regulation, electrical protection, and static switching. The diode has a low thermal resistance, high power handling capability and a maximum breakdown voltage of 20V. It is used mainly in opto-electronic and audio-video applications in order to reduce noise and interference, and to protect the circuit from unexpected changes in voltage. The zener diode works by allowing current to flow in either direction when the voltage across it is below the breakdown voltage, which limit the current to a certain amount in order to protect the circuit from overvoltage surges or no-load conditions.

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