Capacitance, voltage, and ESR for the rail
The TAJW226K010H: Rated 22 µF at 10 V with ±10% tolerance — this is the decoupling or bulk-storage value for a 3.3 V or 5 V rail where the voltage derating rule (typically 50% for tantalum) keeps the working voltage below 5 V. 600 mOhm ESR at 25°C — the ripple current rating and self-heating follow from this; a higher-ESR part runs hotter under the same AC load, so the 600 mOhm figure sets the thermal budget for the board.
Surface-mount 2312 (6032 Metric) case, manufacturer size code W — the 6.00 mm x 3.20 mm footprint with a seated height of 1.50 mm fits low-profile constraints on a densely populated PCB.