Why this cap exists on an automotive BOM
The TAJD336M016TNJV: A 33 µF bulk tantalum that carries AEC-Q200 qualification — the same rating that gates a part into an ECU, a transmission controller, or a sensor module. Without that stamp, a capacitor is a commodity; with it, the traceability and reliability stress screening match the automotive PPAP flow. The 2000-hour endurance at 125°C means the cap is rated for the full under-hood temperature band. In a 105°C ambient, the derating curve buys you margin; at 125°C, the 2000-hour figure is the floor for a continuous-duty application like a DC-DC output filter.
ESR and ripple — the thermal budget check
For a 33 µF cap on a 16 V rail switching at 100 kHz, the I²R loss adds to the ambient temperature — stay below the rated ripple current to keep the internal temperature rise inside the 2000-hour envelope.
Package and footprint — 2917 (7343 Metric), D case
Standard 2917 (7343 Metric) molded case, D size code. 7.30 mm x 4.30 mm footprint, 3.10 mm seated height. Surface-mount, tape-and-reel delivery — the same footprint as every other D-case tantalum, so a BOM swap to a different brand or series keeps the PCB layout.