SMF18AT1G

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SMF18AT1G is a member of the TVS-Diodes family, designed to protect electronic equipment from destructive transients and voltage surges. It offers a reliable and robust solution for current-limiting transient protection in a wide variety of applications.

The SMF18AT1G is a low capacitance, bi-directional TVS diode for transient protection in mobile electronics application. The devices are designed to protect signal lines integrated with an over-voltage protection circuit consisting of a low-impedance, ESD-compliant, p-channel MOSFET and an N-channel MOSFET. The device is available in both SOT-23 and SC-70 packages.

In addition to its low capacitance, the SMF18AT1G has a very fast switching speed with a low clamping voltage. This makes it ideal for protecting high-speed data lines such as USB, HDMI, and Ethernet. Additionally, with a 10V maximum surge rating, the device is more than capable of handling the high transients that can occur in mobile electronics applications.

The working principle of the SMF18AT1G relies on a combination of junctions in the device. When an over-voltage event occurs, the p-channel MOSFET is activated, quickly shunting the transient energy away from the protected device. This reduces the peak voltage to a level that the protected device can safely withstand. At the same time, the N-channel MOSFET is activated. This provides a low-resistance path for current to continue through the device, limiting the amount of energy that can flow to the protected device.

This combination of junctions and components makes the SMF18AT1G an effective solution for protecting electronics from transient events and voltage surges. With its low capacitance and fast switching speed, it is the ideal choice for protecting high-speed data lines in mobile devices. Its wide range of applications, from automotive to consumer electronics, make it a reliable and robust solution for current-limiting transient protection.

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