BZW04-239B-E3/73 Circuit Protection

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The BZW04-239B-E3/73 is a discrete Transient Voltage Suppressor (TVS) diode, designed especially for protecting data lines like Ethernet and USB from electrostatic discharges (ESD). This component is aimed at dissipating high-energy electrical pulses, preserving data integrity, and preventing the destruction of sensitive electronic equipment.

The working principle of the BZW04-239B-E3/73 is based on the traditional avalanche breakdown mechanism. A negative voltage is applied to the diode’s anode, forcing the electrons inside the junction area of the diode to start accelerating to the cathode. This increases the current passing through the diode vertically and ultimately the current flowing through the diode increases exponentially to the point where the diode breakdown and acts like a short circuit.

In the case of the BZW04-239B-E3/73, this breakdown mechanism is triggered by a voltage exceeding its maximum breakdown voltage of 13 VDC. Once triggered, a sharply increasing current is passed through the diode causing internal heat generation. This rapid current dissipates through its anode terminal, while simultaneously creating a very low impedance path thereby preventing any damage to other components connected in series.

The BZW04-239B-E3/73 is ideally suited to applications in Ethernet and USB data line protection, due to its superior performance characteristics. The device features an ESD compliance of +3kV, a response time of less than 1 nanosecond, and a maximum transient energy (Ipp) of 5A@5/1000µs. Its low leakage current and low capacitance make it suitable for high-speed data line protection, while its small package size means it occupies only a minimal amount of board space. This makes the device an excellent choice for any high performance ESD protection design.

In summary, the BZW04-239B-E3/73 TVS diode is an ideal choice for a wide range of data line protection applications. Its superior performance characteristics, low capacitance, low leakage current, and small package size, make it an ideal device for protecting Ethernet and USB data lines against the risk of electrostatic damage.

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