Diodes - Zener - Single - 2EZ3.9D5/TR8 application field and working principle

Single Zener diodes are semiconductor devices with a wide variety of applications in electronic circuits and systems. 2EZ3.9D5/TR8 is a single Zener diode(s) adopted by many circuit designers, primarily due to its excellent electrical characteristics. Its applications and working principles are discussed in this paper.

Introduction

A single Zener diode, such as 2EZ3.9D5/TR8, is a two lead, semiconductor device made of silicon or germanium. It is commonly used in a wide range of electronic circuits, typically to provide a source of controlled voltage for various devices. In a typical application, the single Zener diode is connected in series with a voltage source. This can provide a cost effective, space-saving method of obtaining a steady and reliable voltage in a circuit.

Applications

The 2EZ3.9D5/TR8 has a breakdown voltage of 3.9V and is used in many applications requiring a controlled voltage source for circuits and systems. Its features make it suitable for powering various circuits with DC or AC voltage. Examples of some common applications include: power supplies, DC-DC converters, audio and RF amplifiers, computers, radios, home theatre sets and other electronic circuits. The 2EZ3.9D5/TR8 can also be used to protect components from high voltage or current spikes.

Working principle

The 2EZ3.9D5/TR8 single Zener diode works on the principle of avalanche breakdown. When an electric current passes through a Zener diode arrangement, it generates an electric field across the junction. If the applied voltage reaches a certain, predetermined level, then the electric field is sufficiently strong to cause a small part of the material in the junction to break down. This breakdown results in a large amount of current flowing through the diode, and the diode fails to act as a true diode. However, the Zener diode exhibits its own special effects, which make it useful for various applications.

As the applied voltage continues to increase, the reverse current also increases exponentially. This results in a voltage drop across the diode and the diode acts as a voltage regulator. The diode will generate its breakdown voltage at a predetermined level, and this voltage level will remain constant regardless of the amount of current flow or applied voltage. This is because the reverse current is greater than the forward current, so the voltage across the junction remains constant.

Conclusion

The 2EZ3.9D5/TR8 single Zener diode is a highly efficient and popular device employed in many applications. This diode uses the principle of avalanche breakdown to regulate the output voltage. It is also used as a protective device to guard against high voltage or current spikes. The 2EZ3.9D5/TR8 single Zener diode is a cost-effective and space-saving solution for providing a steady and reliable source of voltage in any circuit.