Sizing the bulk cap for the rail voltage and ripple
The TAJB107M006KNJ: 100 µF at 6.3 V rated — this is a bulk decoupling or hold-up capacitor for a 3.3 V or 5 V rail where the voltage derating (typically 50% for tantalum) leaves margin.
Temperature grade and lifetime at the hot end
In an engine-bay or outdoor telecom enclosure that sees sustained 105°C, the 2000-hour rating at 125°C gives headroom; the actual lifetime doubles for every 10°C drop below the rated temperature.
