BZX84W-B43F

Diodes – Zener – Single

The BZX84W-B43F is a single zener diode in the SOD123 SMD (Surface Mount Device) package. The diode features an “ideal” breakdown voltage of 42.4V and a power dissipation of 500mW. It is designed for use in a wide range of general-purpose and consumer electronics designs, such as transceivers, communication interface circuits, switches, and power supplies.

Application Field and Working Principle

The BZX84W-B43F is primarily used as a voltage regulator, allowing circuit designs to keep a constant voltage in the face of varying current or power consumption by the circuit. This can increase the efficiency of the circuit and eliminate the need for manual voltage adjustments. The diode is also used for reverse current protection in order to protect other components from damage.

The diode works by exploiting the intrinsic characteristics of a diode. Under ordinary conditions, voltage will only flow from the anode to the cathode. However, when the reverse voltage applied to the diode reaches the breakdown voltage, the current will become high enough to cause a conduction path to be formed. The voltage across the diode will then remain constant and the output voltage will remain regulated. This is known as Zener breakdown, and the diode acts as a Zener diode.

Advantages

The BZX84W-B43F offers a number of advantages, such as an improved efficiency, improved stability and protection against over-voltage and reverse current. The diode also offers low voltage variations with very low thermal resistance, ensuring minimal cooling time is required. The diode has a wide operating temperature range, making it suitable for a wide range of applications.

Disadvantages

Like all devices, the BZX84W-B43F has some downsides. The diode has an energy dissipation rate of 250mW, which is relatively low. The device is also vulnerable to electrostatic discharge and can be damaged if exposed to high voltages.

Conclusion

The BZX84W-B43F is a single Zener diode in the SOD123 package. It is primarily used for voltage regulation and reverse current protection. It offers improved efficiency, stability, and protection against over-voltage and reverse current. The device is vulnerable to electrostatic discharge and can be damaged if exposed to high voltages.