1N4749A-TAP Discrete Semiconductor Products

Series:	Automotive, AEC-Q101
Packaging:	Tape & Box (TB)
Part Status:	Active
Voltage - Zener (Nom) (Vz):	24V
Tolerance:	±5%
Power - Max:	1.3W
Impedance (Max) (Zzt):	25 Ohms
Current - Reverse Leakage @ Vr:	5µA @ 18.2V
Voltage - Forward (Vf) (Max) @ If:	1.2V @ 200mA
Operating Temperature:	175°C (TJ)
Mounting Type:	Through Hole
Package / Case:	DO-204AL, DO-41, Axial
Supplier Device Package:	DO-204AL (DO-41)
Base Part Number:	1N4749

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Introduction

The 1N4749A-TAP is a standard single Zener diode. It is used for regulating applied voltages, protecting against voltage surges and regulating voltage levels. It is based on a silicon diode, which when connected to a circuit provides a low-voltage breakdown. This diode has a wide range of applications in many fields such as automotive, consumer electronics and telecommunications. This article will discuss the application field and working principle of this diode.

Application Field

The 1N4749A-TAP can be used in a variety of applications, such as voltage regulation, voltage surge protection, and voltage level regulation. In the automotive field, it can be used to regulate applied and constant voltages, keep voltage levels in check, and provide overload protection to sensitive electronic components in automobiles. This makes the 1N4749A-TAP ideal for the automotive industry. In the consumer electronics field, the 1N4749A-TAP is used for surge protection and voltage level regulation of household appliances such as microwaves, refrigerators, music systems and TVs. Its ability to protect and regulate voltages in these appliances helps ensure smooth operation and less risk of damage to these devices. The 1N4749A-TAP is also used in the telecommunications field for applications such as stabilizing line voltages, adjustable phone line monitoring, and power over Ethernet (PoE). It is also used for protecting telephone lines from spikes in voltage that could cause damage to equipment.

Working Principle

The 1N4749A-TAP consists of a silicon diode in a reverse-biased configuration. When the applied voltage is lower than the breakdown voltage, commonly known as the Zener voltage, current passes through the diode. When the applied voltage is higher than the Zener voltage, the current stops passing through the diode, thus regulating the voltage.The Zener voltage of the 1N4749A-TAP can be adjusted to the desired level by adjusting the amount of reverse bias applied. This helps the diode regulate voltages and provide surge protection.

Conclusion

The 1N4749A-TAP is a single Zener diode that is used for regulating applied and constant voltages, protecting against voltage surges, and regulating voltage levels in a variety of applications. It is a versatile device used in automotive, consumer electronics, and telecommunications fields. Its working principle is based on the reverse biased configuration of a silicon diode that allows for the adjustment of the Zener voltage for the desired level of regulation.

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