SM8S12HE3/2D

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Transient voltage suppressor (TVS) diodes are used to protect sensitive components from voltage spikes or surges. SM8S12HE3/2D is a high-grade TVS diode designed to protect against ESD or EMI in various applications, including automotive electronics, consumer electronics, automotive engine control, industrial control systems, and other electronic applications.

This diode is a small power silicon avalanche diode packaged in a leadless ultra-small MLFM package. It also offers minimal thermal resistance, as well as fast dynamic response and low clamping voltage. Its functionality and performance are superior to conventional diodes in terms of peak current handling, ESD ratings, resistance to high temperatures, and response time.

The SM8S12HE3/2D features low capacitance of 4.5pF, low voltage of 13V, and low leakage of 0.5uA, as well as high ESD and EMI protection qualities. It is optimized for high-frequency applications and offers excellent performance even when subjected to high temperatures. As a result, it can effectively protect automotive and consumer electronic products from voltage spikes and transients.

This TVS diode is also widely used in automotive engine control systems. It can provide ESD and Surge immunity to engine control sensors, input, and power line, as well as greatly reduce the chance of a system failure or component damage due to unexpected power surge. The low capacitance also helps to reduce noise, resulting in higher accuracy of engine control system data.

The working principle of TVS diode is fairly simple. When the voltage surge exceeds the designed breakdown voltage, the diode will start to conduct current and clamp the voltage to a safe level. In the process, its terminal voltage increases from zero to the reverse breakdown voltage and the current increases to a maximum peak value. After that, the current will remain approximately constant and the voltage will build up, thus limiting the voltage to the desired level.

In conclusion, the SM8S12HE3/2D is a reliable and robust TVS diode that is designed to protect sensitive components from voltage spikes and transients. It features low capacitance, low voltage, high ESD and EMI protection qualities, and high temperature tolerance, making it suitable for use in automotive and consumer electronic applications.

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