CDLL4711

Series:	--
Packaging:	Bulk
Part Status:	Active
Voltage - Zener (Nom) (Vz):	27V
Tolerance:	±5%
Power - Max:	500mW
Current - Reverse Leakage @ Vr:	10nA @ 20.4V
Voltage - Forward (Vf) (Max) @ If:	1.1V @ 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

CDLL4711 is a single- package Zener diode developed by Comchip Technology and marketed by Central Semiconductor. Its dual-layer structure and high-temperature polysilicon processing technology help it to offer highly reliable and cost-effective solutions for electronic components used in consumer and industrial applications.

Applications

CDLL4711 is well suited to a variety of applications, including consumer electronics, automotive, telecommunications, industrial and defense applications. It provides strong reverse breakdown protection and is used in EMI suppressors, high-voltage protection circuits, high-frequency communications applications and for ESD protection of consumer products. Additionally, CDLL4711 is used in low-voltage power supplies and battery-powered applications due to its low forward voltage drop.

Working Principle

CDLL4711 functions as a voltage regulator, or “clamping diode”. It is normally reverse-biased, meaning it allows a small amount of current to pass through it in the reverse direction. This current, known as the “Zener current”, is usually very small, typically between 0.5-5 mA. However, when the voltage across the diode reaches the Zener breakdown voltage (also known as the reverse breakdown voltage), an avalanche breakdown occurs, leading to an increase in the Zener current. The Zener breakdown voltage is determined by the doping concentration of the diode and the structure of its P–N junction. CDLL4711 has an operating temperature range of -55°C to +125°C. Its typical Zener breakdown voltage (Vz) is 3.6V and its maximum reverse voltage (Vr) is 400V. The maximum power dissipation is 500mW and the device can dissipate a surge current of 1.1A.

Conclusion

CDLL4711 is a single-package Zener diode from Comchip Technology and is marketed primarily by Central Semiconductor. It is suitable for a variety of applications such as consumer electronics, automotive, industrial and defense, and could be used in a range of applications requiring reverse breakdown protection. CDLL4711 works using the Zener breakdown process, where a device’s P-N junction allows a small amount of current to pass through it in the reverse direction. At a certain voltage, an avalanche breakdown occurs, which leads to an increase in the Zener current. CDLL4711 has an operating temperature range of -55°C to +125°C, typical Zener breakdown voltage of 3.6V, maximum reverse voltage of 400V, maximum power dissipation of 500mW and can dissipate a surge current of 1.1A.

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