USBQ50403CE3/TR7

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TVS diodes or Transient Voltage Suppressors (TVS) are devices designed to protect electrical and electronic equipment from voltage transient or surges. The USBQ50403CE3/TR7 TVS diode is a three-terminal common cathode diode that is designed to protect vulnerable circuits from overvoltage transients and is very common in automotive and industrial applications. This article will provide an overview of its application fields and working principles. First, the USBQ50403CE3/TR7 is a three-terminal, common cathode diode which is designed to protect against overvoltage transients. The device absorbs energy during voltage transients and dissipates it as heat, protecting vulnerable components from overvoltage. The USBQ50403CE3/TR7 has a maximum standoff voltage of 50V and a clamping voltage of 72V. It can offer superior transient protection for automotive and other applications up to 1,000W peak pulse power (10/1000µs) and has a low leakage current of less than 1µA at 25V.The device is ideal for protecting circuits from detrimental voltage spikes generated in automotive and trucks applications. It also is suitable for applications such as radio frequency interference and electromagnetic interference suppressors, relay control circuits, line signal suppressors, communication equipment suppressors, and LED lighting surge protectors. In terms of its working principles, the USBQ50403CE3/TR7 has three terminals; identified as the anode, cathode, and control. The anode and cathode are connected to the device power supply, while the control terminal is used to monitor the voltage across the device and control the device conduction. When the ambient voltage across the device exceeds the pre-set threshold, the diode is triggered and bias current is applied to reduce the voltage across the device, thereby providing protection for the underlying components.The USBQ50403CE3/TR7 creates a short circuit path between anode and cathode when triggered. When the transient surge or overvoltage passes, the device stops conducting current and reverts to its typical off-state. The device is also designed with a reverse polarity protection to ensure it will not be damaged by reverse connection between anode and cathode.In summary, the USBQ50403CE3/TR7 TVS diode is a very reliable device for providing overvoltage protection for automotive and industrial applications. It has a maximum standoff voltage of 50V and can offer superior transient protection for automotive and other applications up to 1,000W peak pulse power (10/1000µs). In terms of its working principles, it has three terminals with the anode and cathode connected to the device power supply while the control terminal is used to monitor the voltage and provide the device conduction.

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