BZX585-B3V9,135

Single Zener diodes are a class of semiconductor devices that are of great importance when it comes to providing voltage regulation. BZX585-B3V9,135 is a single Zener diode with an impressive array of features and specifications. It has a breakdown voltage rating of 3.9 V and an average power dissipation rating of 135 mW. It is a compact SOT-23 package and contains two opposing junctions.

Applications

The BZX585-B3V9,135 Zener diode is used in a variety of applications due to its ability to provide voltage regulation. Some of its primary applications include voltage reference circuits, voltage stabilizing, voltage clamping, transient suppression, and negative voltage protection. Furthermore, it can also be used in series with a resistor to create a temperature-compensated voltage regulator. This diode can also be used as an alternate way to provide overvoltage protection in lieu of a transistor.

Working Principle

When forward biased, the BZX585-B3V9,135 Zener diode behaves like a normal PN junction diode, allowing current to flow between its anode and cathode terminals. When reverse biased, the diode has a much higher voltage rating with a breakdown voltage at 3.9 V. This phenomenon is known as avalanche breakdown and it is the working principle behind how the BZX585-B3V9,135 Zener diode regulates voltage. When reverse biased, the Zener diode has a very high resistance to current, but as the voltage increases, it eventually overwhelms the diode\'s resistance and causes it to break down and provide a low resistance path for current flow.

Conclusion

The BZX585-B3V9,135 Zener diode is a highly versatile device with a wide range of applications. It is frequently used as a voltage reference, voltage stabilizing, voltage clamping, transient suppression, and negative voltage protection device. It is also used as a temperature-compensated voltage regulator in series with a resistor. Its working principle relies on avalanche breakdown for forward-biased operation and reverse-biased operation.