The recommended footprint and land pattern for SMBJ28A-Q can be found in the Bourns Application Note AN164, which provides guidelines for PCB layout and assembly.
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. Bourns provides a TVS Diode Selection Guide that can help with this process.
The main difference between SMBJ28A-Q and SMBJ28CA-Q is the AEC-Q101 qualification. SMBJ28CA-Q is AEC-Q101 qualified, which means it meets the automotive industry's standards for reliability and performance. SMBJ28A-Q does not have this qualification.
The SMBJ28A-Q is rated for operation up to 150°C, but its performance may degrade at high temperatures. If your application requires operation above 125°C, consider using a TVS diode with a higher temperature rating, such as the SMBJ28A-Q-HR, which is rated for operation up to 175°C.
To ensure the reliability of SMBJ28A-Q, follow proper PCB layout and assembly guidelines, ensure proper thermal management, and consider using a TVS diode with a built-in thermal protection feature. Also, perform thorough testing and validation of your design to ensure it meets the required specifications.
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