The TAJB475K035UNJ: Rated AEC-Q200, this tantalum capacitor is qualified for automotive-grade stress and reliability testing — temperature cycling, moisture resistance, and mechanical shock per the AEC-Q200 standard. The 2000-hour endurance at 125°C means it survives the thermal profile of an engine-bay ECU or a transmission controller across the vehicle's service life, not just the first few thousand miles.
ESR and case size — fit for the board
3.1 Ohm ESR at 100 kHz sets the ripple current ceiling — in a 35 V rail with 100 mV ripple, the self-heating stays within the 125°C rating as long as the RMS current stays under ~180 mA. The B case (1411 / 3528 Metric) is a common footprint; the 2.10 mm seated height clears most low-profile enclosures.