Bulk decoupling on a tight rail — 220 µF, 4 V, 40 mOhm ESR
The low ESR is what matters for a power rail — it keeps ripple voltage down and handles transient current without excessive self-heating. On a 3.3 V or 1.8 V supply, the 4 V rating gives about 20 % derating margin, which is standard practice for tantalum to avoid surge failures.
That means it belongs on boards that see avionics cold-soak, downhole heat, or satellite thermal cycling. The molded case holds up to the expansion cycles better than a dipped part.
Package and footprint — 2917 (7343 Metric), size code D
Standard 2917 footprint, 7.30 mm x 4.30 mm, seated height 3.10 mm max. The D case code is common across the TPS series — your existing pad layout for a D-size tantalum should accept this part without a board spin.