The recommended footprint and land pattern for SMF4L28AT1G can be found in the Littelfuse application note AN9313, which provides guidelines for surface mount assembly of TVS diodes.
To select the correct TVS diode, consider factors such as the maximum voltage, current, and power rating required for your application. Also, consider the clamping voltage, response time, and capacitance of the TVS diode. Littelfuse provides a TVS Diode Selection Guide that can help with this process.
A unidirectional TVS diode protects against voltage surges in one direction, whereas a bidirectional TVS diode protects against voltage surges in both directions. The SMF4L28AT1G is a unidirectional TVS diode. If bidirectional protection is required, a different part number such as the SMF4L28AT3G should be considered.
The SMF4L28AT1G is a commercial-grade TVS diode, but Littelfuse offers high-reliability and automotive-grade versions of similar TVS diodes, such as the SP4L28AT1G and SQF4L28AT1G, respectively. These devices meet stricter requirements for operating temperature, storage temperature, and reliability.
Follow the recommended soldering and assembly guidelines provided in the Littelfuse application note AN9313, which includes information on soldering temperatures, times, and techniques, as well as handling and storage precautions.
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SMF4L28AT1G Overview
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