TPS22810: MTBF and FIT rate

Hello Team,

I am looking at MTBF on TPS22810DRVR

I´ve done the calculation online and got for both the value FIT=0,1 at 55°C.

Also for other components like the SN2104035 (L1V30837572) we have in use I get these value of FIT=0,1 also at 55°C.

Moreover I´ve done calculation for TPS562211 (L1V30873931); here I´ve got FIT=0,2 at 55°C.

Here I´m little astonished, because a standard

Kerko X7R already has FIT-value FIT=2 at 40°C.

Kerko C0G already hat FIT-value FIT=1 at 40°C

Are these values really realistic?.

Thank you!

Christian