2EZ4.7D2/TR12

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Introduction

A 2EZ4.7D2/TR12 is a particular type of Zener diode, with a single gate. Zener diodes are a type of diode that provides greatly reduced breakdown voltages, making them very useful for limiters and clamping circuits. This application note explains the field of applications and working principle of this particular type of Zener diode.

Application Field

2EZ4.7D2/TR12 have several uses in both electrical and electronic components. Firstly, they are often employed as a voltage reference device. This is because the breakdown voltage of a Zener diode remains constant despite variations in current or temperature. Secondly, 2EZ4.7D2/TR12 can be used in surge protectors and clampers to prevent overvoltage damage to components. In addition, they are useful for connecting wires between different circuits with different polarities.

Working Principle

The working principle of a Zener diode can be explained in two stages. Firstly, when the diode is in a reverse-bias configuration, the electric field through the diode causes a very small current to start flowing. This current is known as reverse-biased leakage current. When the electric field is strong enough, it causes the electrons to flow through the junction of the diode, creating a situation similar to the breakdown of an ordinary diode. This is known as Zener breakdown. Secondly, the electric field, when strong enough causes the electrons to drift through the layers of the diode, creating a further increase in current, referred to as avalanche breakdown. The combination of Zener breakdown and avalanche breakdown is what causes the Zener diode to have its greatly reduced breakdown voltage.

Conclusion

A 2EZ4.7D2/TR12 Zener diode is a particular type of single-gate diode with a greatly reduced breakdown voltage. It is primarily used for voltage reference, surge protection, and connecting wires between circuits with different polarities. The working principle of a 2EZ4.7D2/TR12 can be explained in two stages: when the diode is reverse-biased, a very small current called reverse-biased leakage current flows through the diode, and when the electric field is strong enough Zener breakdown and avalanche breakdown create an increased current.

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