3EZ22D5E3/TR12

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Voltage - Zener (Nom) (Vz):	22V
Tolerance:	±5%
Power - Max:	3W
Impedance (Max) (Zzt):	8 Ohms
Current - Reverse Leakage @ Vr:	500nA @ 16.7V
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:	3EZ22

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Introduction

The 3EZ22D5E3/TR12 is a type of single Zener diode, which belongs to a family of electronic components whose general purpose is to control the voltage in a circuit. These diodes can be used to control the voltage in any circuit requiring regulation, protection, or rectification, and are particularly useful for shunt applications. This article will explain the application field and working principle of the 3EZ22D5E3/TR12 diode.

Application Field

The 3EZ22D5E3/TR12 single Zener diode is designed for use in AC-to-DC rectification, voltage regulation, and protection. In AC-to-DC rectification, the 3EZ22D5E3/TR12 diode can be used to convert an alternating current (AC) waveform into a direct current (DC) waveform. This is done by only allowing the positive half-cycles of the AC waveform to pass through the diode in a positive direction. The resulting waveform is a DC waveform. In voltage regulation, the 3EZ22D5E3/TR12 can be used to control the voltage within a specific range. This is done by connecting a resistor in series with the diode, and then connecting the diode to the voltage source. When the voltage across the diode reaches a certain predetermined value, the diode will conduct electricity and the voltage will remain fairly constant. The 3EZ22D5E3/TR12 can also be used in protection applications. In these applications, the diode is generally connected reverse biased, meaning the anode is connected to a higher voltage than the cathode. This arrangement will prevent any excess current flowing through the diode, and thus prevent any damage to the circuit.

Working Principle

The 3EZ22D5E3/TR12 single Zener diode consists of two semiconductor layers of different doping levels, forming one PN junction. The P-type semiconductor layer has a higher doping level than the N-type so that the PN junction has a negative potential barrier. When the applied voltage is higher than this barrier, the current starts to increase, allowing more current to flow over the device. This diode operates in two different modes, depending on the direction of the applied voltage. In the forward-bias mode, the diode conducts current and behaves roughly as an ordinary diode. In this mode, the diode is forward biased, and no current will pass when the applied voltage is below the breakdown voltage. In the reverse-bias mode, the junction behaves differently. In this mode, the diode will not conduct any current, even when the applied voltage is greater than the breakdown voltage. This is because the potential barrier between the two layers is still high enough to prevent any current flow.When the applied voltage is greater than the breakdown voltage, the potential at the junction decreases, allowing the current to start flowing in the reverse direction. The amount of current flow is proportional to the magnitude of the applied voltage.

Conclusion

The 3EZ22D5E3/TR12 single Zener diode is a versatile electronic component commonly used for AC-to-DC rectification, voltage regulation, and protection applications. Its working principle involves the use of two semiconductor layers of different doping levels and the various characteristics that occur at the PN junction between these layers.

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