BZW04P239-E3/73

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A TVS diode, also known as a Transient Voltage Suppressor (TVS) diode, is a special type of diode specially designed to protect components from transient or momentary voltage spikes. BZW04P239-E3/73 is such a device with a peak pulse power rating of 4kW (8/20us). In this article, we will discuss its application field and working principle.

As the name implies, transient voltage suppressors are designed to protect electrical components from spikes in voltage. These spikes can be caused by lightning strikes, power outages, or short-term disruption of electricity. A properly designed TVS diode can rapidly reduce the speed of the voltage spike, limiting damage to the underlying components. Typical applications of BZW04P239-E3/73 TVS diodes includes overvoltage protection for automotive infotainment systems, fault protection for industrial equipment, and surge protection for digital TV.

A TVS diode is basically composed of a diode connected in parallel with a zener diode. When a transient voltage spike is applied, the TVS diode conducts at such a high rate that the zener diode becomes reverse biased. This stops the voltage spike from passing through it and diverts the excess voltage away from the component being protected. As a result, the device being protected is protected from damage due to the transient voltage spike.

BZW04P239-E3/73 is part of STMicroelectronics\' BZV-series of TVS diodes with peak pulse power rating of 4kW (8/20us). It has a working voltage range of 5.5V to 170V and a maximum peak surge voltage of 200V. It features a fast response time of 1.5ns, a low capacitance value of 0.2pF, and a maximum peak clamping voltage of 243V. It is also RoHS compliant, making it ideal for use in green applications.

In summary, a BZW04P239-E3/73 TVS diode is a great choice to provide protection against transient voltage spikes. It is suitable for use in automotive infotainment systems, industrial equipment, and digital TV. With its fast response time, low capacitance values and RoHS compliance, it is a reliable choice for use in a wide variety of applications.

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