What this tantalum cap does on your rail
The TAJC685M025RNJ: 6.8 µF at 25 V with 2 Ω ESR — this is a mid-value tantalum for bulk decoupling on a 12 V or 5 V rail, not a high-frequency bypass cap. The ±20% tolerance means the actual capacitance can land between 5.44 µF and 8.16 µF; budget that spread when sizing the hold-up time for a power-good window.
Size C case in the 2312 (6032 Metric) footprint — 6.00 mm x 3.20 mm body, 2.80 mm seated height. The molded case is surface-mount reflow compatible; the 2 Ω ESR is typical for this case size at 25 V.