3EZ3.9D5E3/TR12

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Voltage - Zener (Nom) (Vz):	3.9V
Tolerance:	±5%
Power - Max:	3W
Impedance (Max) (Zzt):	4.5 Ohms
Current - Reverse Leakage @ Vr:	80µA @ 1V
Voltage - Forward (Vf) (Max) @ If:	1.2V @ 200mA
Operating Temperature:	-65°C ~ 150°C
Mounting Type:	Through Hole
Package / Case:	DO-204AL, DO-41, Axial
Supplier Device Package:	DO-204AL (DO-41)
Base Part Number:	3EZ3.9

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Diodes, the most common type of semiconductor device, are explained as a two terminal design with various customized applications available depending on their construction, features and performance. In addition, specific diode types such as Zener and Schottky diodes are well-known for their reverse breakdown voltage characteristics. Of these, single Zener diodes are most often encountered and used in various applications. The 3EZ3.9D5E3/TR12 is a single diode in the Zener series, and is offered by engineering parts supplier Digi-Key. This diode and its related application field and working principle are further discussed below.

Description

The 3EZ3.9D5E3/TR12 is a single, N-type Zener diode and is appreciated for its low forward voltage and stability. This specific variation was manufactured to surpass the European Union’s Restriction of Hazardous Substances Directive 2002/95/EC (RoHS) standards, indicating it is free from toxic and hazardous materials and compliant with universal health and safety standards. Its maximum reverse voltage is referenced at 3.9 V and, when combined with its peak power dissipation, it is an optimal choice for high-current applications.

Application Field

The wide application fields of the 3EZ3.9D5E3/TR12 include power supplies, voltage regulation, test equipment, and various consumer and industrial electronics. It is generally used to supply regulated voltages by forming a working circuit with a voltage source and resistor. In addition, it is also utilized in thermocouple circuits, temperature measuring devices and measuring instruments. Furthermore, many automotive components and other specialized applications make use of the diode, such as switching circuits, reversed voltage protection and LED drivers.

Working Principle

External sources can be linked to the anode of the diode, form which a built-in electric field is formed through the region between the junction. If the voltage drops below the critical point, current will become reversed, thus allowing the voltage source to continue administering the unregulated voltage. Nevertheless, the design of the 3EZ3.9D5E3/TR12 diode prevents current from flowing through the external source and keeps it contained within the device. This is known as Zener breakdown and is the primary working principle of this single Zener diode.

Conclusion

Given its robust design, peak power dissipation and RoHS compliance, the 3EZ3.9D5E3/TR12 single Zener diode is a solid choice for various applications such as power supplies, voltage regulation, test equipment, and more. It works by forming a working circuit with a voltage source and resistor, and its principles of Zener breakdown isolates the external source and allows for a regulated voltage. In conclusion, the 3EZ3.9D5E3/TR12 single Zener diode is used in many applications due to its reliable performance, low forward voltage and stability.

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