Primary side TVS validation through power rating

AN4160

12/14

DocID023640 Rev 2

4.1

SMAJ13CA

In the SMAJ13CA datasheet, the Peak Pulse Power versus exponential pulse duration is

provided. According to this parameter, a pulse lasting 1µs can be withstood if its power is

lower than 9 kW.

This limit is exceeded by the previously measured PPEAK. Therefore, the SMAJ13CA TVS

could be considered suitable for 4 kV level compliance only.

4.2

SMA6J13CA

In the SMA6J13CA datasheet, the Peak Pulse Power versus exponential pulse duration is

provided. According to this parameter, a pulse lasting 1µs can be withstood if its power is

lower than 11 kW.

This power capability is higher than the requirement set by the measurements above.

Therefore, it is safe to use SMA6J13CA TVS up to 6 kV surge level.

4.3

SM6T15CA

The SM6T15CA TVS has the same power rating as the SMA6J13CA, so the same

conclusions described above shall apply.