3EZ18D2E3/TR8

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Voltage - Zener (Nom) (Vz):	18V
Tolerance:	±2%
Power - Max:	3W
Impedance (Max) (Zzt):	6 Ohms
Current - Reverse Leakage @ Vr:	500nA @ 13.7V
Voltage - Forward (Vf) (Max) @ If:	1.2V @ 200mA
Operating Temperature:	-65°C ~ 150°C
Mounting Type:	Through Hole
Package / Case:	DO-204AL, DO-41, Axial
Supplier Device Package:	DO-204AL (DO-41)
Base Part Number:	3EZ18

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Introduction

Diodes are a fundamental component of almost every circuit, providing two-way conduction between two terminals whilst limiting electrical flow to only one direction. In this article, we take a look at the particular class of diodes known as Zener diodes, focusing on the particular single version known as 3EZ18D2E3/TR8, and consider its application fields and internal workings.

Applications

Due to the unique character of Zener diodes, they can be used in a number of applications ranging from voltage regulation to voltage stabilization and even protection from overvoltage conditions. By enabling the passage of electric current in the reverse direction at specific voltages through the junction of two different types of semiconductors,the 3EZ18D2E3/TR8 single Zener diode allows for robust and reliable voltage regulation. Common uses for the 3EZ18D2E3/TR8 single Zener diode include audio amplifiers, mobile phone circuits, LED signal line regulation, and even the manufacture and maintenance of power devices such as power transistors.

Working Principle

A Zener diode acts as a voltage-sensing device which can be attached either directly or by a voltage divider, to a particular voltage source. Due to the properties of the semiconductor materials which make up the junction between the anode and cathode, the 3EZ18D2E3/TR8 single Zener diode will allow for current flow in only one direction. If the voltage applied to the diode exceeds its Zener voltage, then the junction enters into the Zener breakdown mode, allowing the diode to conduct in the reverse direction from the cathode to the anode. Thus, energy from the same voltage source is then “bled-off” in order to maintain the desired operating voltage.

Conclusion

In summary, 3EZ18D2E3/TR8 single Zener diodes have a range of uses, from audio amplification and voltage regulation to mobile phone circuitry and even the manufacture and maintenance of power devices. Furthermore, their unique properties allow them to keep a circuit’s voltage level in check by “bleeding-off” energy in the reverse direction when the voltage applied to the diode exceeds its Zener voltage.

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