BZX84C18W-7

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Discontinued at Digi-Key
Voltage - Zener (Nom) (Vz):	18V
Tolerance:	±6%
Power - Max:	200mW
Impedance (Max) (Zzt):	45 Ohms
Current - Reverse Leakage @ Vr:	100nA @ 12.6V
Voltage - Forward (Vf) (Max) @ If:	900mV @ 10mA
Operating Temperature:	-65°C ~ 125°C
Mounting Type:	Surface Mount
Package / Case:	SC-70, SOT-323
Supplier Device Package:	SOT-323
Base Part Number:	BZX84C18

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Introduction

The BZX84C18W-7 is a single zener diode that is commonly used in applications that require high voltage protection. The BZX84C18W-7 is designed for use in high voltage applications, such as those in power supplies and automotive electronics, where protection from overvoltage is necessary. This diode is designed to provide protection from typical overvoltage and ESD related damage associated with these applications. The diode features a low forward voltage drop which allows for efficient operation. Additionally, it has an ultra-high voltage protection range of 8.0 to 10.8 volts.

Applications

The BZX84C18W-7 can be used in a variety of applications. One of the main applications is that of a high-voltage surge protector. The diode will provide protection from overvoltage conditions and ESD related damage. It is also used in automotive electronics, where it protects against voltage spikes and overvoltages. Additionally, the diode can be used in power supplies to ensure that the output voltage does not exceed the maximum rating.The BZX84C18W-7 can also be used in a variety of other applications, such as LED lighting and medical electronics, where protection from overvoltage is necessary. Additionally, the diode is well suited for use in high power applications, such as in industrial and military electronics.

Working Principle

The BZX84C18W-7 is a single zener diode made up of two p-n junctions. When a voltage is applied, the current flows through one of the two junctions and the other junction will remain in a reverse bias state. This is how the diode is able to provide protection from overvoltage conditions. When the applied voltage is higher than the zener voltage, the reverse biased junction will start to become forward biased. This allows the current to flow in the reverse direction, providing protection from overvoltage situations. Additionally, the BZX84C18W-7 also provides protection from static electricity as the reverse current can absorb any transient spikes that may occur.

Conclusion

The BZX84C18W-7 is a single zener diode that is used in a variety of applications. It is designed to provide protection from overvoltage and ESD related damage. The diode features a low forward voltage drop which allows for efficient operation. Additionally, it has an ultra-high voltage protection range of 8.0 to 10.8 volts. The working principle of the BZX84C18W-7 is such that it uses two p-n junctions to provide protection from overvoltage conditions. This diode is well suited for use in high voltage applications, such as those in power supplies and automotive electronics.

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