SMAJ5918AE3/TR13

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Voltage - Zener (Nom) (Vz):	5.1V
Tolerance:	±10%
Power - Max:	3W
Impedance (Max) (Zzt):	4 Ohms
Current - Reverse Leakage @ Vr:	5µA @ 2V
Voltage - Forward (Vf) (Max) @ If:	1.2V @ 200mA
Operating Temperature:	-65°C ~ 150°C
Mounting Type:	Surface Mount
Package / Case:	DO-214AC, SMA
Supplier Device Package:	DO-214AC (SMAJ)
Base Part Number:	SMAJ5918

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Introduction

SMAJ5918AE3/TR13 is a Zener diode commonly used in many applications. It has many variations and types, but it all essentially acts as a protection device. Its uni-directional current flow is used to limit excessive current from damaging components or circuitry. Zener diodes provide protection for important components in circuit designs, such as conductors and voltage regulators.

Uses and Applications

SMAJ5918AE3/TR13 diodes can be found in many applications, such as electrical systems, power supplies, and mobile devices. They are used to protect components from current overload and overvoltage conditions. In power supplies, they can be used to protect against short circuits and voltage spikes. In electrical systems, they are often used as protection devices against voltage fluctuation and surges.Moreover, they can be found in various integrated circuits, such as microcontrollers, logic circuits, and motor controllers. They are use to protect components against reverse polarity, transients, and overvoltage. SMAJ5918AE3/TR13 can also be used for radio frequency (RF) applications, such as antenna matching and radio frequency identification (RFID) systems.

Working Principle

SMAJ5918AE3/TR13 works by utilizing its Zener behavior to regulate voltage within certain limits or to maintain an absolute voltage. When the voltage applied to a diode is below the breakdown voltage of the diode, current will flow from anode to cathode as in a regular diode.When the voltage applied to the diode exceeds its breakdown voltage, it will behave differently and current will flow in both directions. This is known as Zener effect.The current through the diode will rise sharply until it reaches a specific level at which the voltage drop across the diode is approximately equal to the breakdown voltage.The SMAJ5918AE3/TR13 has various breakdown voltages, with a rated maximum of 28 V. It also has a maximum surge current capability of 10 mA. In addition, it has a power dissipation rating of 1/2 Watt and a high temperature coefficient of -0.22 % per °C.

Conclusion

SMAJ5918AE3/TR13 is a Zener diode widely used in many applications. It works by utilizing its Zener capability to regulate voltage and limit excessive current. Its breakdown voltage of 28V and power dissipation rating of 1/2 Watt makes it suitable for many electrical systems, power supplies and mobile devices. It is a versatile and reliable protection device for many types of circuitry, providing protection from overvoltage, current overload, and too much current.

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