1N4749AHR1G

Series:	Automotive, AEC-Q101
Packaging:	Tape & Reel (TR)
Part Status:	Active
Voltage - Zener (Nom) (Vz):	24V
Tolerance:	±5%
Power - Max:	1W
Impedance (Max) (Zzt):	25 Ohms
Current - Reverse Leakage @ Vr:	5µA @ 18.2V
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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Introduction

The 1N4749AHR1G is a single Zener diode. It is a small, discreet component used in many electrical and electronic applications. It is ideal for use in circuits requiring a low-voltage, low-power diode with a tight tolerance on the voltage drop across the diode. It is particularly useful in providing a stable voltage reference for circuits.

Application Field and Working Principle

The 1N4749AHR1G is used in many applications from powering portable electronics such as laptop computers and cell phones to being part of the protection circuit in various electronic control systems. It is specifically designed to provide a stable voltage in applications where a small power dissipation and tight tolerance are required.It works on the principle of rectifying a small AC input voltage and producing a constant DC voltage. This voltage is usually steady over a wide range of operating conditions. The 1N4749AHR1G has a reverse bias voltage at which it starts conducting. This voltage is what is referred to as its Zener voltage. This voltage is typically in the range of 18V to 50V. At low Zener voltages, the diode functions like a normal diode and rectifies the small AC voltage into DC. As the voltage across the diode reaches the Zener voltage, the diode will start conducting in the reverse direction and the current in the circuit will split between the AC source and the Zener diode. The voltage will remain at the Zener voltage until the current in the Zener diode reaches the safe maximum.When the current in the Zener diode reaches its maximum, the voltage across the diode will drop. This is because the diode no longer has access to the energy in the AC source. The diode will then start conducting in the forward direction again, allowing the current to flow freely through the diode.

Advantages

A major advantage of the 1N4749AHR1G is its consistent voltage output. Since it produces a steady, predictable voltage level, it is ideal for use in circuits that require a stable voltage reference. It also provides better accuracy and less variability than other Zener diodes, making it a good choice for applications requiring precise voltage regulation.In addition, the 1N4749AHR1G is a low-power diode, making it a better choice than other more power-hungry diodes. This makes it ideal for use in battery-powered applications, where power consumption is an important factor. The 1N4749AHR1G is also a low-cost diode, making it a great choice for applications with tight budget constraints. Its low power consumption, consistent performance, and affordability make it a great choice for a wide range of applications.

Conclusion

The 1N4749AHR1G is a single Zener diode that provides a range of advantages, from its consistent voltage output to its affordability. It is designed specifically for applications that require a low-voltage, low-power diode with a tight tolerance on the voltage drop across the diode. It is a great choice for many different applications, from portable electronics to complex electronic control systems.

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