The recommended footprint and land pattern for the SMBJ40A-HR can be found in the Littelfuse application note AN9313, 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 package type, operating temperature range, and any specific certifications or standards required (e.g. automotive, industrial, etc.).
The SMBJ40A-HR is a high-reliability version of the SMBJ series TVS diodes, with a higher surge current rating and a more stringent testing and screening process. It is designed for high-reliability applications such as aerospace, defense, and medical devices.
The SMBJ40A-HR is rated for operation up to 150°C, but its performance and reliability may degrade at high temperatures. It's recommended to derate the device's power rating and consider using a heat sink or other thermal management techniques to ensure reliable operation.
Follow the recommended soldering and assembly guidelines provided in the Littelfuse application note AN9313, and ensure that the PCB layout and assembly process meet the requirements for the SMBJ40A-HR package type.
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SMBJ40A-HR Overview
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