PLZ12A-G3/H

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Voltage - Zener (Nom) (Vz):	12V
Tolerance:	±3%
Power - Max:	500mW
Impedance (Max) (Zzt):	12 Ohms
Current - Reverse Leakage @ Vr:	200nA @ 9V
Voltage - Forward (Vf) (Max) @ If:	900mV @ 10mA
Operating Temperature:	150°C
Mounting Type:	Surface Mount
Package / Case:	DO-219AC
Supplier Device Package:	DO-219AC (microSMF)

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Introduction

A Zener diode is a semiconductor device that allows current to flow in either direction and exhibits a distinct breakdown voltage when exposed to a voltage in either direction. The PLZ12A-G3/H is a single Zener diode with a rated voltage of 12 V, maximum power dissipation of 750 mW (1/2 W), and a typical reverse leakage current of 0.5 mA. It is designed for both fast switching and low power dissipation applications.

Applications

The PLZ12A-G3/H Zener diode is used in a variety of electronic circuits such as overvoltage protection and voltage reference circuits. In an overvoltage protection circuit, the diode clamps and limits the voltage across a load. In a voltage reference circuit, a voltage source is used to reverse bias the diode, establishing a reference voltage at the diode’s zener voltage.In addition, the PLZ12A-G3/H is used in voltage stabilized circuits, voltage regulator circuits, current regulator circuits, and bridge rectifier circuits. It can also be used in series and shunt regulator circuits, for surge and transient protection, for voltage limiting, and for noise suppression.

Working Principle

When the diode is forward biased, the positive voltages applied to the anode (A) pushes the electrons, or negative charge carriers, across the depletion region (J), until an equilibrium is reached and the diode conducts current.When the diode is reverse biased, the negative voltage applied to the cathode (K) pushes additional charge carriers away from the cathode and the depletion region width increases. As the voltage increases, the free electrons of the n-type material combine with the holes of the p-type material and form additional depletion region barriers. As the voltage is increased further, these barriers will break down and allow current to flow. This is known as the breakdown voltage or zener voltage. The PLZ12A-G3/H diode has a zener voltage of 12 V.

Conclusion

The PLZ12A-G3/H is a single Zener diode with a rated voltage of 12 V and a typical reverse leakage current of 0.5 mA. It is used for fast switching, low power dissipation applications, overvoltage protection, voltage reference, voltage stabilized circuits, voltage regulator circuits, current regulator circuits, bridge rectifier circuits, series and shunt regulator circuits, for surge and transient protection, for voltage limiting and for noise suppression. The Zener diode works by creating a depletion region with the forward bias, which allows the electrons to cross, and by applying a reverse bias voltage the depletion widens until a breakdown voltage is used to allow current to flow.

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