JAN1N4494C

Series:	Military, MIL-PRF-19500/406
Packaging:	Bulk
Part Status:	Active
Voltage - Zener (Nom) (Vz):	160V
Tolerance:	±2%
Power - Max:	1.5W
Impedance (Max) (Zzt):	1000 Ohms
Current - Reverse Leakage @ Vr:	250nA @ 128V
Voltage - Forward (Vf) (Max) @ If:	1V @ 200mA
Operating Temperature:	-65°C ~ 175°C
Mounting Type:	Through Hole
Package / Case:	DO-204AL, DO-41, Axial
Supplier Device Package:	DO-41

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Introduction

JAN1N4494C is a single Zener diode from the family of General Semiconductor products. It is designed to be used in various applications such as surge protection and voltage regulation. The diode is qualified through a suite of tests which can be reviewed and compared with other similar products. This article examines the application field and working principle of the JAN1N4494C.

Application Field

In the electrical field, the diode is mostly used in the area of surge protection. Due to its high reverse leakage current, it can be used to dissipate static energy that is susceptible to lightning strike or power-line surges. It is also suitable for preventing over-voltage conditions brought on by an increase in the supply voltage of transient phenomena. Furthermore, it can be deployed in line protection of large capacitors and other high voltage components.The diode is also often applied in the field of voltage regulation. It provides a stable and continuous flow of current which helps to maintain the output voltage of the regulator circuit. The regulation process is based on the amount of current that is being drawn from the diode. As the current level increases, the voltage is reduced, which prevents overvoltage conditions in the circuit.

Working Principle

The JAN1N4494C is a single Zener diode that utilizes a p-n junction to control the flow of current in the circuit. The diode is designed in such a way that it has a reverse breakdown voltage, which is usually specified in the datasheet. When the reverse voltage exceeds the specified level, the current will increase rapidly in the diode. This phenomenon is known as Zener breakdown and it is the principle upon which the diode works.The diode has two modes of operation, namely avalanche and Zener breakdown. In the avalanche regime, the voltage is gradually increased until an avalanche of electrons occurs in the depletion region. This can result in a large current flow that can damage the component. On the other hand, in the Zener breakdown, the voltage is increased slowly until the voltage reaches the breakdown voltage. This causes the diode to conduct current in both directions, making it suitable for use in voltage regulation.

Conclusion

The JAN1N4494C is a Zener diode from the family of General Semiconductor products used in surge protection and voltage regulation applications. It has a reverse breakdown voltage that is specified in the datasheet, and with this feature, it can be used in a wide variety of applications. It also utilizes a p-n junction to control the flow of current and has two modes of operation, namely avalanche and Zener breakdown. With the knowledge of its application field and working principle, engineers can quickly identify the JAN1N4494C as the right component for their applications.

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