CZRA4746-G

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Voltage - Zener (Nom) (Vz):	18V
Tolerance:	±5%
Power - Max:	1W
Impedance (Max) (Zzt):	20 Ohms
Current - Reverse Leakage @ Vr:	5µA @ 13.7V
Voltage - Forward (Vf) (Max) @ If:	1.2V @ 200mA
Operating Temperature:	-55°C ~ 150°C
Mounting Type:	Surface Mount
Package / Case:	DO-214AC, SMA Flat Leads
Supplier Device Package:	DO-214AC (SMA)

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CZRA4746-G Application Field and Working Principle

Diodes - Zener - Single is a type of diode which is used for voltage regulation and noise suppression purpose. It consists of two electrodes, usually two p-n junctions, and the output voltage is predetermined by the breakdown voltage of the Zener diode. CZRA4746-G is a type of Zener diode under this category, and it is designed for low voltage, low current voltage regulation applications.

Application Field of CZRA4746-G

CZRA4746-G has a maximum power rating of 0.5 watts at 25℃ ambient temperature. Its operating range includes a wide range of currents from 5 mA to 75 mA and voltage range from 4.7V to 16V. Since it has a low power consumption, it is suitable for current-sensitive and low voltage application, such as hearing aids and others. It also has excellent thermal stability, which allows it to handle higher voltage and current.

Working Principle of CZRA4746-G

The working principle behind CZRA4746-G is based on the concept of "Zener breakdown". It occurs when the electric field across the junction of a diode reaches the critical value called the "Zener Breakdown Voltage" or the "Zener voltage". When the voltage across the diode reaches this value, the electrons can overcome the traditional single-junction barrier and flow from the n-type region to the p-type region. This, in turn, allows the current across the diode to increase rapidly, causing a "breakdown" and protecting the device from over-voltage.

This Zener breakdown occurs due to the diffusion of electrons and holes between the opposite regions of the diode. As the voltage of the diode is increased (over the Zener Voltage), electrons diffuse from the n-region to the p-region, while holes diffuse from the p-region to the n-region. This creates an electric field between the regions which is strong enough to break down the junction barrier, allowing electrons to flow freely.

The CZRA4746-G therefore can be used in many applications. It can be used for current-limiting, for clamping off excessive voltages, for filtering out high-frequency noises and for reference voltage generation. It can be used to provide voltage regulation, as well as for noise suppression. In addition, it is also used in small electronic circuits such as hearing aids and mobile phones.

Conclusion

The CZRA4746-G is a type of diode that is optimized for low voltage and low current applications, such as hearing aids and mobile phones. It is based on the concept of "Zener breakdown" which occurs when the voltage across the diode exceeds the Zener voltage. It can be used for current-limiting, clamping off excessive voltages, filtering out high-frequency noises, and reference voltage generation.

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