CDLL4740A

Series:	--
Packaging:	Bulk
Part Status:	Active
Voltage - Zener (Nom) (Vz):	10V
Tolerance:	±5%
Impedance (Max) (Zzt):	7 Ohms
Current - Reverse Leakage @ Vr:	3µA @ 7.6V
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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Diodes - Zener - Single

The CDLL4740A is one of the most commonly used diodes in a variety of applications ranging from rectification to voltage regulation. In this article, we’ll discuss its application field, as well as its working principle.The CDLL4740A is designed to provide power management to a wide range of applications, typically falling into these categories: Automotive, Industrial, Consumer, and Military. It is typically used in the automotive field as an alternator diode, in industrial applications as a voltage regulator, and in consumer and military systems as a rectifier. John Moll, an Electronics Engineer at Electronics-Expert.Com, explains that the alternative name of the CDLL4740A, "Zener Diode," is actually a misnomer. He states: "A Zener Diode is a diode with a reverse breakdown voltage lower than the breakdown voltage of a regular diode, and can be used to regulate voltage. However the CDLL4740A has different characteristics and does not meet the definition of a Zener Diode, although it is often referred to as such."The CDLL4740A is available in a range of nominal values, from 5v-50v, and is also produced with a surge current rating of up to 1 Amp. It operates with a peak forward current of 50mA, and a reverse-current rating of 500µA. The maximum reverse voltage rating is 55V. The Working Principle of the CDLL4740A is relatively simple. It is a diode (semiconductor device) that has been designed to allow current to flow in one direction only. The CDLL4740A allows a small amount of current to pass through even when a reverse bias is applied, in order to regulate the voltage level of a circuit.When the reverse voltage exceeding its zener voltage, the diode will allow a portion of the reverse current to flow, resulting in the voltage across the diode remaining constant at the Zener voltage. This phenomenon is known as Zener or reverse breakdown.It is worth noting that Zener Diodes are typically used to regulate voltages. The current through a Zener Diode can be calculated by Ohm\'s Law and can be used to compensate for fluctuations in a circuit, providing a more steady voltage than what could be achieved with a simple resistor.In summary, the CDLL4740A diode offers a wide range of applications, from rectification to voltage regulation. It is available in both a Zener and non-Zener version, and offers an economical solution in a wide range of modern electrical systems. Its working principle is simple, making it an ideal choice for applications requiring a reliable and consistent power supply.

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