SMBJ85A-TR Frequently Asked Questions (FAQs)

• What is the maximum operating temperature range for the SMBJ85A-TR?
  The maximum operating temperature range for the SMBJ85A-TR is -40°C to 150°C.
• How do I ensure the SMBJ85A-TR is properly soldered to the PCB?
  To ensure proper soldering, follow the recommended soldering profile and use a solder with a melting point above 217°C. Also, make sure the PCB is designed with a suitable thermal pad and clearance to prevent overheating.
• Can I use the SMBJ85A-TR in a high-frequency application?
  While the SMBJ85A-TR is designed for high-speed switching, it's not recommended for high-frequency applications above 1 MHz due to its internal capacitance and inductance. For high-frequency applications, consider using a different TVS diode or consulting with an STMicroelectronics application engineer.
• How do I select the correct SMBJ85A-TR variant for my application?
  Select the correct SMBJ85A-TR variant based on the required standoff voltage, peak pulse current, and package type. Consult the datasheet and STMicroelectronics' selection guide to ensure the chosen variant meets your application's requirements.
• What is the recommended PCB layout for the SMBJ85A-TR to minimize parasitic inductance?
  To minimize parasitic inductance, place the SMBJ85A-TR close to the protected circuit, use short and wide traces, and avoid vias and sharp corners. Also, consider using a ground plane and a shielded cable to reduce electromagnetic interference.