CDZT2R4.7B

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Not For New Designs
Voltage - Zener (Nom) (Vz):	4.7V
Tolerance:	±2%
Power - Max:	100mW
Impedance (Max) (Zzt):	100 Ohms
Current - Reverse Leakage @ Vr:	2µA @ 1V
Operating Temperature:	-55°C ~ 150°C
Mounting Type:	Surface Mount
Package / Case:	SOD-923
Supplier Device Package:	VMN2

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CDZT2R4.7B Application Field and Working Principle

Introduction

CDZT2R4.7B is a type of single Zener diode. It is a diode whose electric field is modified to permit it to operate in reverse breakdown. The maximum reverse breakdown voltage of CDZT2R4.7B is 4.7 Volts, while its maximum forward current is 500 mA. It has a power rating of 350 mW. This diode has a low threshold voltage and is used in many applications that require a highly stable voltage in the reverse direction.

Application Field

CDZT2R4.7B can be employed in various fields. For example, Zener diodes protect electronic devices from overvoltage by preventing peculiar electric waves in circuits. They are most commonly employed as voltage references and overload protection elements in digital circuits. Moreover, due to their tolerance and low-threshold voltage, Zener diodes are suitable for noise suppression and voltage regulator circuits. These diodes are also popular for use in automotive electronics such as transistors and voltage regulators. CDZT2R4.7B has a lower threshold voltage than other Zener diodes and it can be used in switching regulators, voltage monitors, voltage comparators, logic circuits, and line voltage regulation. This type of diode is also useful in DC-DC converters, LED controllers, battery-operated devices and other power control circuits. It is also used in radio frequency (RF) applications and surge protection circuits.

Working Principle

CDZT2R4.7B can be explained by its three distinct operating modes. During the forward bias operating mode, the diode has high reactance, allowing current to flow through it in the forward direction. When the diode is in reverse bias mode, a low amount of current flows through it. Finally, during the Zener breakdown mode, when the voltage across the diode exceeds the Zener breakdown voltage, such as the CDZT2R4.7B, large quantities of current are permitted to flow in the reverse direction, while the voltage remains stable at the Zener breakdown voltage. By employing the CDZT2R4.7B diode, the voltage across its terminals remains fixed at the Zener breakdown voltage. This allows for precise and consistent voltage regulators, as the output is not affected by input voltage changes. This also allows for precise comparison with its reference voltage. It is also important to note that the reverse current flow can generate heat in the diode and thus it is important to consider the power rating of the diode for proper operation. In summary, CDZT2R4.7B is a single Zener diode with a maximum breakdown voltage of 4.7 Volts and a maximum forward current of 500 mA. It has multiple applications, such as in voltage regulators, logic circuits, RF applications, power control circuits, and noise suppression. It operates in three distinct modes: forward bias, reverse bias and Zener breakdown mode. In Zener breakdown mode, the voltage across the diode remains fixed at the Zener breakdown voltage, allowing for precise and consistent voltage regulation.

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