BZW04-5V8B

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The BZW04-5V8B is an axial leaded Bi-directional Transient Voltage Suppressor (TVS) Diode from NXP Semiconductors. A TVS diode is used for surge current and overvoltage protection in most electronic systems. The BZW04-5V8B has a maximum capacitance of 1.3pF, a leakage current of 32 nA, a maximum avalanche energy of 12 J, and a stand-off voltage of 5.8V.

The BZW04-5V8B is typically used in consumer electronics, communication and automotive systems. It can be used to protect against overvoltages caused by ESD (electrostatic discharge), electrical transients, power line surges, load dump, inductive switching, etc. It provides protection with a maximum clamping voltage of 8.2V and a response time of less than 1ns. Its fast response time helps protect the connected circuit from damage due to overvoltage.

The BZW04-5V8B has a low capacitance and low leakage current, making it suitable for use in high frequency circuits. The BZW04-5V8B has a wide operating temperature range of -55°C to +125°C. It is available in SOT457 (DFN4) package, and features industry-standard, RoHS compliant packaging options for ease of integration.

Working principle: The BZW04-5V8B TVS diode is used to protect circuits from transient overvoltage activities. The diode, when exposed to a high voltage surge, quickly conducts the current to ground, thus protecting the circuit from damage. This works on the principle of avalanche breakdown. When the voltage across the diode reaches the breakdown voltage, the diode breaks down and conducts current to ground. The avalanche breakdown is caused by the impact ionisation of the PN junction, where electrons become highly energetic when they collide with the barrier of the junction, thus creating more charge carriers (holes and electrons). The additional charge carriers reduce the barrier and cause it to break down. The internal structure of the diode is such that it is able to withstand high surge currents.

In summary, the BZW04-5V8B is an axial leaded Bi-directional TVS diode from NXP Semiconductors. It has a maximum capacitance of 1.3pF, a leakage current of 32 nA, a maximum avalanche energy of 12 J, and a stand-off voltage of 5.8V. It is typically used in consumer electronics, communication and automotive systems for surge current and overvoltage protection. It works on the principle of avalanche breakdown, where when the voltage across the diode reaches the breakdown voltage, the diode quickly conducts current to ground, thus providing protection to the connected circuit.

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