The TAJB225K035H: This is a molded tantalum capacitor from the KYOCERA AVX TAJ series, size B case (1411 / 3528 Metric). 2.2 µF capacitance with ±10% tolerance at 35 V rated voltage — a common value for decoupling on 24 V or 12 V rails where a bit of bulk capacitance is needed after the regulator. The 4.2 Ohm ESR is on the higher side for a 2.2 µF part — that limits the ripple current it can handle before self-heating becomes an issue. Fine for general-purpose decoupling, but if the circuit has high-frequency ripple above a few hundred mA, you will want to check the thermal derating.
The molded case and surface-mount package (size B) are standard for automated assembly; no special handling beyond the usual tantalum polarity caution.