The TPSB336M006R0600: For a BOM that runs another two to three years, the supply risk is low.
33 µF capacitance at a 6.3 V rated voltage: this cap is sized for a 3.3 V or 1.8 V rail where the DC bias derating is minimal. The 6.3 V rating gives about 50 % headroom above a 3.3 V rail, which keeps the capacitance stable under bias. 600 mOhm ESR at 100 kHz — this is the ripple-current limiter. For a 100 mA ripple at 100 kHz, the self-heating is I² × ESR = 6 mW, negligible in free air. But at 500 mA ripple the dissipation jumps to 150 mW, which raises the internal temperature and accelerates aging. The ESR number is the ceiling for your ripple budget.
It will hold its capacitance down to -55°C (typical tantalum derating is about 10 % at that extreme) and survive 125°C soak, though the leakage current rises with temperature — budget for that in a high-impedance bias network.
1411 / 1210 case — two land patterns, one part
Package / Case is listed as 1411 (3528 Metric), 1210 — the same physical body fits both standard footprints. The body dimensions are 3.50 mm × 2.80 mm with a seated height of 2.10 mm max. If your board already has a 1210 tantalum pad, this part drops in without a layout change.