MUR340S datasheet by Taiwan Semiconductor

MUR340S Frequently Asked Questions (FAQs)

• What is the recommended soldering temperature profile for the MUR340S?
  The recommended soldering temperature profile for the MUR340S is a peak temperature of 260°C for 10-15 seconds, with a preheat temperature of 150-180°C and a cooling rate of 4-6°C/s.
• Can the MUR340S be used in high-frequency switching applications?
  While the MUR340S is a fast-recovery diode, it's not suitable for high-frequency switching applications above 100 kHz due to its relatively high reverse recovery time (trr) of 35 ns. For high-frequency applications, consider using a diode with a lower trr.
• How do I ensure the MUR340S is properly derated for high-temperature operation?
  To ensure proper derating, follow the temperature derating curve provided in the datasheet. For example, at 125°C, the maximum average forward current (IF(AV)) is reduced to 3A. Always check the datasheet for specific derating information.
• What is the recommended PCB layout and thermal management for the MUR340S?
  For optimal thermal performance, use a PCB layout with a large copper pad (at least 1 cm²) connected to the cathode pin, and ensure good thermal conduction to the heat sink or chassis. Keep the diode away from other heat sources and ensure adequate airflow.
• Can the MUR340S be used in parallel to increase current handling?
  Yes, the MUR340S can be used in parallel to increase current handling, but ensure that each diode has its own separate heat sink and that the diodes are matched for forward voltage drop (VF) to prevent uneven current sharing.