BZX55F27-TR

Diodes - Zener - Single

The BZX55F27-TR is a semiconductor zener diode with a power dissipation of 300mW in a SOT-23 package from Vishay, offering superior thermal performance. This device provides tight tolerance voltage regulation when used as a shunt regulator or reflated capacitor in switching power supplies, and is widely used in many applications.

Application Field

The BZX55F27-TR are widely used for a variety of power supply applications. As a shunt regulator, it supports tight tolerance voltage regulation, which is beneficial in switching power supplies. Additionally, it can be used as a power supply clamp, protecting circuits from high voltage surges. The BZX55F27-TR can also be used as a reference voltage source and buffer.

Working Principle

The BZX55F27-TR is a zener type diode and relies on the diode’s junction to provide the voltage control. This device consists of a normal diode, composed of two-layers of semiconductor P and N type materials, in which electrons and holes are stored. When the diode is forward-biased, the stored electrons and holes move freely, and current passes through the device. In the reverse bias conditions, the depletion region increases, and the electric field becomes stronger, creating a potential barrier. When a certain reverse voltage is applied, the electric field becomes too strong, which causes the potential barrier to break and current starts flowing. This is known as the breakdown voltage. As the current increases, the electric potential decreases, and the device keeps a certain voltage across the diode, which is known as the zener voltage.

Conclusion

The BZX55F27-TR is a zener diode from Vishay, with a power dissipation of 300mW in a SOT-23 package. This device is widely used for various power supply applications, such as shunt regulators, power supply clamps, and reference voltage sources. It relies on the diode’s junction to provide the voltage control, which is known as the zener voltage. Its tight tolerance voltage regulation makes this device a great choice for many applications.