SMBJ75A-HRA

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A TVS (Transient Voltage Suppressor) diode, such as the SMBJ75A-HRA, is an essential and versatile component for providing fast-acting and reliable electrical overvoltage protection in power, communication, and data line circuits. TVS diodes are designed to protect atcatastrophic overvoltage events, such as those generated by primary lightning events or shorted power supplies, by clamping the voltage to a safe level.

The SMBJ75A-HRA employs a Dual Common Anode (DCA) design in which two symmetric silicon diodes are connected in parallel with a single anode terminal. This symmetrical topology eliminates temperature-related and DC operating point parameters (issues associated with single clamping elements), providing improved performance, reduced device variation, and increased surge current capabilities.

The working principle of the SMBJ75A-HRA is relatively simple. When the DC voltage applied to the anode of the device exceeds its breakdown voltage, the diode will begin to conduct and the voltage across the diode will be clamped to a safe value. The breakdown voltage is determined by the junction used and the design of the device, and is typically between 7.5 and 9.0 volts. During normal operation, no current flows through the diode, making it an ideal bi-directional protection component.

The SMBJ75A-HRA has many applications field. It is widely used to protect communication lines and power supplies from voltage transients in devices such as smart phones, computers, and gaming consoles. It is also commonly used in the automotive industry, where its ability to protect against extreme overvoltage events make it suitable for automotive applications such as power supply over-voltage protection, reverse battery polarity protection, and Automotive Ethernet protection. Furthermore, it is suitable for high-frequency transient performance, such as in RF transmitters that require protection against ESD events.

In conclusion, the SMBJ75A-HRA is a reliable and highly versatile TVS diode that provides an effective means of protecting sensitive electronics and data lines against ESD and other transient voltage events. With its symmetric design, low capacitance, and superior surge current ratings, it is a perfect choice for a wide variety of applications.

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