CDLL4730

Series:	--
Packaging:	Bulk
Part Status:	Active
Voltage - Zener (Nom) (Vz):	3.9V
Tolerance:	±10%
Impedance (Max) (Zzt):	9 Ohms
Current - Reverse Leakage @ Vr:	100µA @ 1V
Voltage - Forward (Vf) (Max) @ If:	1.2V @ 200mA
Operating Temperature:	-65°C ~ 175°C
Mounting Type:	Surface Mount
Package / Case:	DO-213AB, MELF
Supplier Device Package:	DO-213AB

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Introduction to CDLL4730 Zener Diode

The CDLL4730 is a small signal zener diode designed for a wide range of applications. It has a low breakdown voltage, fast switching speed, and low leakage current. It is available in various package options including axial, surface mount, and through-hole.

Application Fields of CDLL4730 Zener Diode

CDLL4730 Zener diode is widely used in voltage regulation, voltage clamping, peak pulse current protection, supply voltage noise reduction and surge protection. The Zener diode is capable of regulating line voltage to a consistent and stable output. It can be used to set a voltage limit that the line voltage cannot exceed. It is ideal for preventing malfunction by overvoltage caused by transient events. This makes the Zener diode suitable for voltage regulation of power supply lines in communication equipment, personal computers, and other electronic equipment where a stable voltage is required.In addition, the Zener diode acts as a voltage clamp. This is important for protection of delicate electronic circuits from electrical spikes or inductive loads such as relay coils. When the voltage at the diode goes above the breakdown voltage, the diode begins to conduct and the voltage is clamped to the breakdown voltage.The Zener diode is also suitable for peak pulse current protection. It can absorb the transient current without significant degradation of the device, so it can be used to protect circuits from the effects of lightning strikes and power supply surges.Similarly, the Zener diode can reduce supply voltage noise. It acts as a low pass filter, allowing AC or high frequency signals to pass through. This reduces noise in the power supply line, and is especially useful for noise reduction in power supply lines for data acquisition systems and precision instrumentation.Lastly, the zener diode is used for surge protection. It is used to protect sensitive equipment from spikes in the power supply line or from external lightning strikes. The Zener diode absorbs the voltage spike, preventing it from damaging the electronic equipment.

Working Principle of CDLL4730 Zener Diode

The CDLL4730 Zener diode is a PN junction diode with a reverse bias voltage of 0.5V to 30V. It consists of an n-type semiconductor and p-type material, forming a P-N junction. As the reverse bias voltage increases, electrons near the junction start to tunnel through the junction and current starts flowing. At a certain voltage, referred to as the Zener breakdown voltage, the current increases sharply. This is the point where the diode begins to conduct in the reverse direction and voltage is no longer able to increase further. The voltage will remain constant at the breakdown voltage. This process, referred to as Zener breakdown, is the working principle of the Zener diode. The breakdown voltage can be selected by changing the junction area and material used.The zener diode can absorb high pulses of current without being permanently damaged. This allows the diode to protect circuits from voltage spikes, peak pulse current protection, and other transient events. The Zener diode also has a low forward drop voltage. This helps reduce power loss in the power supply line, making the diode highly efficient.

Summary

The CDLL4730 Zener diode is a reliable and efficient way to regulate voltage and provide protection against voltage spikes in electronic circuits. It has a low breakdown voltage, fast switching speed and low leakage current. It is suitable for a wide range of applications including voltage regulation, voltage clamping, peak pulse current protection, supply voltage noise reduction and surge protection. The Zener diode works by clamping the voltage at the diode junction to the breakdown voltage. This ensures that the output voltage remains consistent at the specified voltage no matter the input voltage. The Zener diode also has a low forward drop voltage, making it an efficient way to protect circuits from voltage surges.

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