BZX79-C15,143

The BZX79-C15,143 is a Zener diode designed for general purpose use. It operates in the reverse direction, turning a low voltage into a higher voltage, while preventing a higher voltage from passing through the diode. The BZX79-C15,143 can be used in a variety of applications ranging from rectification, breakdown/clamping and voltage references.

Application and Working Principle

The principle application of the BZX79-C15,143 is to provide protection against overvoltage, or to maintain a constant voltage reference. In the reverse direction, the diode provides the ability to “short” out higher voltages, making it useful in rectifiers or other overvoltage protection applications. The diode also has a low forward voltage rating meaning it can be used to ensure voltage does not exceed a certain threshold.

The diode works by “clamping” the voltage across its terminals when the zener “breaksdown” voltage. This occurs when the voltage reaches a certain level and the current through the silicon increases exponentially. This allows components on either side of the diode to be protected from higher than expected voltage.

The BZX79-C15,143 has a reverse breakdown voltage of 15V and a maximum power rating of 200mW. It has a total capacitance of 0.2pF and a max reverse current of 5mA. The diode is available in a SOT-23 package, which is an industry standard footprint.

Conclusion

The BZX79-C15,143 is a reliable and commonly used Zener diode ideal for general purpose applications. Its ability to safely control overvoltages gives it a broad range of applications from rectification to voltage references. It features a low forward voltage rating, total capacitance of 0.2 pF, and a max reverse current of 5mA, making it a great versatile solution for most needs.