The TAJC225M035SNJ is a 2.2 µF tantalum capacitor rated at 35 V, with a ±20% tolerance. That 35 V rating gives headroom on a 12 V or 24 V rail — the derating rule of thumb for tantalum is 50% of rated voltage, so this part is comfortable up to about 17.5 V continuous, keeping the failure rate low. The 3.5 Ohm ESR (Equivalent Series Resistance) is the number to watch for ripple current. In a switching power supply output filter, that ESR sets the ripple voltage and self-heating.
The footprint is 6.00 mm x 3.20 mm with a seated height of 2.80 mm max — standard for a tantalum chip cap, reflow-solder compatible.