The TAJT157M002RNJ: This is a molded tantalum capacitor from the TAJ series, rated 150 µF at 2.5 V with ±20% tolerance. The 1.2 Ohm ESR sets the ripple current limit and self-heating — for a 2.5 V rail pulling 500 mA, the ESR drop is 0.6 V, so the capacitor sees about 0.3 W of internal dissipation at full ripple.
The part is still a standard catalog item, so there is no rush to stockpile or redesign around an obsolescence date.
Sourcing against a BOM line
The molded 1411 case (3.50 mm x 2.80 mm footprint) is a common size, so the part fits standard pick-and-place reels.
