TV50C480JB-G Circuit Protection

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TVS or Transient Voltage Suppressor devices are components that are used to dissipate the energy of voltage and current transients in order to protect other components from harm on a circuit board. The TVS diode that is the topic of this article is the TV50C480JB-G device. The application fields, working principle, and overall design of this device will be discussed and explained in the following sections.

Application Field

The primary application field of the TV50C480JB-G is the protection of high-speed computer and data communications networks. This diode provides protection against signal transients caused by lightning, ESD, and other high-voltage surge events. Its maximum clamping voltage is 48V, making it useful for protecting 5 and 12V CMOS logic circuits, as well as for shielding serial and USB data lines. It is rated for 8A peak pulse current with a pulse width of 10μs.

Working Principle

The TVS diode operates by clamping transient events to a certain safe voltage, dissipating their energy so as not to harm other circuit components. This is achieved by a carefully designed semiconductor structure that rapidly turns the device on when the clamping voltage is reached. The TVS device shunt-regulates the transient voltage, steering it to a safe level and dissipating the energy by allowing an electric current to flow through the device.

Design

The TV50C480JB-G sports a surface-mount design with an exposed aluminum back, which facilitates heat transfer away from the device during operation. The diode is housed in a microchip package that measures 5.0mm x 3.2mm x 2.1mm. It has a low thermal resistance (θJ-A) value of 18°C/W, enabling it to dissipate greater amounts of energy without incurring significant damage. The device is also qualified for MSL1 handling conditions, ensuring proper operation after board-level assembly processes.

Conclusion

The TV50C480JB-G diode by TVS is a versatile transient voltage suppressor designed for use in high-speed computer and data networks. It is capable of clamping transients up to 48V and dissipating their energy safely, protecting sensitive electronics from harm. Its small size and low thermal resistance make it an ideal choice for applications where board space is at a premium. With its combination of features and capabilities, the TV50C480JB-G is a great choice for any protective circuit design.

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