1N4746AHR0G

Series:	Automotive, AEC-Q101
Packaging:	Tape & Reel (TR)
Part Status:	Active
Voltage - Zener (Nom) (Vz):	18V
Tolerance:	±5%
Power - Max:	1W
Impedance (Max) (Zzt):	50 Ohms
Current - Reverse Leakage @ Vr:	5µA @ 13.7V
Operating Temperature:	-55°C ~ 150°C (TJ)
Mounting Type:	Through Hole
Package / Case:	DO-204AL, DO-41, Axial
Supplier Device Package:	DO-204AL (DO-41)

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1N4746AHR0G Application Field and Working Principle

The 1N4746AHR0G is a single Zener diode which is one of the most important electronic components. Zener diodes have a unique characteristics that enable them to regulate a voltage applied across them reliably. whether they are used to protect circuits from overvoltage, to regulate voltage in circuits or to provide other functionalities, 1N4746AHR0G is an essential and versatile device.

Function

The main purpose of the 1N4746AHR0G is to provide reliable voltage regulation with a breakdown voltage of 6.8V, reverse standoff voltage of 6.2V, and a maximum power rating of 500mW/T. Additionally, this diode also functions as a noise filter and surge protection for circuits. In many cases, it can also be used as a temperature indicator.

Types

There are two distinct types of Zener diodes, planar and diffused. Planar Zener diodes are produced by doping the junction region with a thin film of heavily doped material. This type of device is ideal for high-reliability applications because it is more reliable than diffused Zener diodes. In comparison, diffused Zener diodes are made by etching a deep groove into a heavily doped quartz or silicon wafer substrate, then depositing heavily-doped material in the groove and allowing the wafer to cool. Diffused Zener diodes are the most commonly used type of diode and are often used in consumer-level applications.

Operation

The 1N4746AHR0G Zener diode functions by allowing current to flow only when a certain voltage is applied across the diode. When the voltage threshold is reached, the diode enters the breakdown region and allows current to flow. In the breakdown region, the diode allows for a large current flow with a low voltage drop. This is beneficial since it allows the circuit to be regulated without having to use expensive voltage regulators.

Application

The 1N4746AHR0G Zener diode is widely used in various electronic applications. Its primary purpose is in providing reliable voltage regulation. It is commonly used in power supplies, temperature sensing circuits, audio amplifiers, transistor regulators, fuse protection circuits, and motor control systems. It is also used in automotive and aerospace applications.

Advantages

The 1N4746AHR0G Zener diode has several advantages over other types of diodes. It has a low forward voltage drop and low leakage current which helps increase efficiency. Additionally, it is well-suited for use in circuits that may experience voltage transients or surges. Furthermore, it is relatively inexpensive and can dissipate significant amounts of heat without deteriorating.

Conclusion

The 1N4746AHR0G Zener diode is a versatile electronic component that is well-suited to a variety of applications. It is especially useful in providing reliable voltage regulation and surge protection. Additionally, its low forward voltage drop and low leakage current make it an efficient device suitable for various power electronic applications. Lastly, it is relatively inexpensive and can dissipate considerable amounts of heat without significantly degrading.

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