BZX84-B39,215

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Diodes - Zener - Single

A diode is a two-terminal electronic component that allows current to flow in one direction. Zener diodes are a subset of diodes, and single Zener diodes are a subset of Zener diodes. One example of a single Zener diode is the BZX84-B39,215. In this article, we will discuss the application field and working principle of the BZX84-B39,215.

Application Field

The BZX84-B39, 215 is a single Zener diode with a nominal reverse voltage of 39V. It is an SOD123 package diode with a uniform standoff construction. It provides improved power dissipation performance with a low reverse leakage current. This diode is often used in applications such as voltage regulation, overload protection, and level shifting. It is used to regulate the voltage level across a circuit by allowing current to flow in only one direction, while allowing current to flow to the other direction in relatively insignificant quantities.

Working Principle

The BZX84-B39,215 works on the principle of Zener breakdown. When a Zener diode is operating in its reverse-bias region, a large enough voltage will cause a process called electron-hole pairs generation. This generation of electron-hole pairs forms a conductive channel within the diode, which is known as the Zener breakdown. It is this breakdown that enables the diode to become a voltage regulator.

When the Zener diode is forward-biased, that is, the voltage is reversed, current will flow through the diode. However, when this current reaches a certain level, known as the Zener voltage, the voltage across the diode increases and causes the Zener breakdown. This breakdown causes a proportionate rise in the diode’s current, and the diode will thus regulate the voltage level across the circuit.

Conclusion

The BZX84-B39,215 is a single Zener diode with a nominal reverse voltage of 39V and a SOD123 package. It is used in voltage regulation, overload protection, and level shifting applications. It works on the principal of Zener breakdown, where a large enough voltage causes an electron-hole pair generation that forms a conductive channel, allowing current to flow in only one direction while allowing current to flow to the other direction in relatively insignificant quantities.

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