SMF28A-HE3-08 Circuit Protection

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TVS (Transient Voltage Suppression) diodes are electronic components used for protecting systems from over-voltage transients. The SMF28A-HE3-08 is a bidirectional, low capacitance, diode manufactured by Littelfuse. Designed for use in high-speed communications and data line applications, this TVS Diode is capable of protecting systems from damage due to voltage spikes in environments such as lightning or electrostatic discharge events.

An over-voltage transient is an electrical event during which an electrical component or system is exposed to a voltage which exceeds its rated operating voltage. Over-voltage transients can cause significant damage to components or systems if not adequately protected. To prevent damage due to such transients, a TVS diode such as SMF28A-HE3-08 is used to protect systems from these events.

The SMF28A-HE3-08 is designed for bi-directional protection of data lines, such as digital video, USB, and other communications lines. The diode is capable of protecting lines from voltage transients up to 30 Volts, with a working operating voltage of 5.5 Volts. The diode has very low capacitance of less than 1.3pF, and can handle peak current levels up to 8A. Due to its low capacitance, the diode does not affect the transmission of signals and can thus be used for high-speed data line applications. The diode is also RoHS compliant, making it suitable for use in environmentally friendly equipment.

The working principle of the SMF28A-HE3-08 is fairly straightforward. In the event of an over-voltage transient, the diode will conduct current away from the vulnerable system components, thus protecting the components from damage. The transient voltage is clamped to the diode’s Breakdown Voltage, at which point the current through the diode will be limited.

TVS diodes such as the SMF28A-HE3-08 provide a simple and cost-effective solution for protecting electronic equipment from over-voltage transients. The diode is specially designed for bi-directional protection in high-speed data line applications, and is capable of withstanding the high voltage involved in such applications. The diode is also RoHS compliant, making it suitable for use in environmentally friendly equipment. With its low capacitance and high peak current handling capability, the SMF28A-HE3-08 is an ideal solution for protecting sensitive electronic equipment.

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