4.7 µF, 16 V — the two numbers that lock the BOM line
TAJA475K016ANJ is a molded tantalum capacitor from the TAJ series, delivering 4.7 µF capacitance with ±10% tolerance at a 16 V DC rated voltage.
In a 16 V rail decoupling a 100 kHz switching regulator, that ESR translates to roughly 1.4 A ripple current before self-heating becomes a concern — check the thermal derating curve in the datasheet if your ambient is above 85°C. In an engine-bay ECU that sees 105°C continuous, you are looking at well over 10,000 hours of useful life — but a 125°C hot-spot near a power device will consume that budget faster.