BZX79-B15,143

Diodes - Zener - Single

The BZX79-B15,143 is a single Zener diode. It is used for many applications, including regulating the voltage in a circuit, adjusting the threshold of a comparator, or used as a voltage reference. Though primarily used in electronics and signaling, it can also be used in power applications.

General Description

The BZX79-B15,143 is a single Zener diode silicon avalanche diode that has a cathode connected to the anode in a reverse direction. It has a breakdown voltage of 15 volts a power rating of 145mW and a maximum reverse leakage current of 50 µA at 25°C. Its junction temperature is -55°C to 150°C and its rated temperature is 125°C.

Applications

The BZX79-B15,143 is a versatile diode and can be used on many applications. It is ideal for low power supply applications such as those in computing and other digital devices. It can be used as a voltage reference to provide a reference level for analog to digital conversion. It can also be used as a voltage limiter in circuits, where the voltage should not exceed a certain value. Additionally, it can be used as a current limiter, protecting the circuit from excessive amount of current.

Working Principle

The BZX79-B15,143 has a reverse biased junction, which means that the diode is connected in the reverse direction than it should be. This enables the diode to act as a voltage regulator or voltage limiter. When the voltage across it exceeds the breakdown voltage, electrons become accelerated and create a high amount of additional current. Upon returning to its normal state, it acts to limit or regulate the voltage across it. This is the same principle that is used in zener diodes.

Advantages

The BZX79-B15,143 offers a range of advantages. It is low cost, highly efficient and is able to handle high currents. It also has a low leakage current, which makes it suitable for low power applications many other types of diodes are not able to handle. Additionally, its small size makes it suitable for applications where space is at a premium.

Disadvantages

Despite its many advantages, the BZX79-B15,143 also has some potential drawbacks. Its breakdown voltage rating means that it may not be able to handle the higher voltages and currents of some applications. Additionally, its junction temperature rating may limit the usefulness of this diode for some applications, particularly in extreme temperatures.

Conclusion

The BZX79-B15,143 is a versatile and low cost single Zener diode. It is ideal for a wide range of applications, including voltage regulation and voltage limiting. Although it may have some drawbacks, its low cost and small size make it a desirable choice for many applications.