GDZ18B-HG3-18

Series:	Automotive, AEC-Q101
Packaging:	Tape & Reel (TR)
Part Status:	Active
Voltage - Zener (Nom) (Vz):	18V
Tolerance:	±2%
Power - Max:	200mW
Impedance (Max) (Zzt):	65 Ohms
Current - Reverse Leakage @ Vr:	100nA @ 13V
Operating Temperature:	-65°C ~ 150°C
Mounting Type:	Surface Mount
Package / Case:	SC-76, SOD-323
Supplier Device Package:	SOD-323

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Introduction

The GDZ18B-HG3-18 is a single, two-terminal zener diode in a TO-92 package, with a maximum reverse breakdown voltage of 18V. The device is designed to provide simple, cost-effective solutions for voltage regulation and suppression of transients on low voltage circuits. The diode is capable of passing up to 1A of current and is available both in DO-35 encapsulated (for higher power applications) and slim SOT-23 packages. The device is characterized by a wide operating temperature range and low forward voltage drop.

Application Field of GDZ18B-HG3-18

GDZ18B-HG3-18 is a power diode applicable in a wide range of voltage regulation and suppression of transients. It provides effective protection against voltage spikes and short duration power surges across a wide operating temperature range while also offering low forward voltage drop. The GDZ18B-HG3-18 is an ideal device for overvoltage and surge protection in low voltage bus applications, such as for regulated power supplies, converters and other systems that require a regulated voltage. It is used in cell phone chargers, line conditioners, laptops, and other consumer products to prevent sudden spikes in voltage or current. The diode also finds use in applications such as automotive low voltage circuits, LCD and LED displays, data transmission lines, and audio systems. It can also be used in various high voltage overvoltage/surge protection applications.

Working Principle of GDZ18B-HG3-18

The GDZ18B-HG3-18 is chiefly used as a voltage regulator and regulator in the power industry. It is fundamental to understand the working principle of the diode in order to understand its application field and its implementation. The working principle of the GDZ18B-HG3-18 is based on that of a typical Zener diode. It consists of a P-type layer sandwiched between two N-type layers. As current flows through the diode, the P-type layer acts as the rectifying junction with a built-in electric field that prevents reverse breakdown voltage from overriding the designed value. When the forward-bias voltage is greater than the reverse breakdown voltage of the diode, the electric field is weakened and a breakdown current flow occurs. This reverse-bias condition causes the current to increase exponentially, as long as the voltage remains above the breakdown voltage level of the diode. At a certain voltage level, usually designated as the Zener voltage, the diode holds a certain current.The reverse characteristics of the GDZ18B-HG3-18 is symmetric, meaning that voltage increases and decreases the same, making it an ideal choice for applications that require accurate voltage regulation and protection. The diode is also capable of passing up to 1A of current, so it can be used in applications with higher power requirements.

Conclusion

The GDZ18B-HG3-18 is a single, two-terminal zener diode in a TO-92 package capable of passing up to 1A of current. It is designed for simple, cost-effective solutions for voltage regulation and suppression of transients on low voltage circuits and is characterized by a wide operating temperature range and low forward voltage drop. The diode is mainly used in power industry applications like overvoltage and surge protection on low voltage bus applications, such as regulated power supplies, converters, and other systems. The principle behind its working is based on a typical Zener diode, and the symmetry of the reverse characteristics of the diode makes it ideal for applications that require accurate voltage regulation and protection.

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