33 µF, 16 V, 900 mOhm — the bulk decoupling anchor
The 16 V rating gives you 20 % derating on a 12 V rail, which is standard practice for tantalum to keep the failure rate in check. ESR at 900 mOhm sets the ripple current limit: at 100 kHz, the self-heating stays manageable for most DC-DC output filters.
Active production — no end-of-life scramble
Listed as Active — current production, no last-time-buy deadline looming. The TAJ series is a long-running KYOCERA AVX line, so second-source equivalents from Kemet or Vishay are common in the same 2917 footprint, but this exact order code is the one on your BOM.
No derating needed down to -55°C; the capacitance change over temp is within the ±10 % tolerance band.