Parametric fit and ESR impact on the bulk rail
The TPSD476M025R0250: That ESR figure is the key parameter for bulk decoupling on a 25 V rail — it sets the ripple current handling and the self-heating under AC load. A 250 mOhm ESR at 47 µF gives a dissipation factor around 6% at 120 Hz, which is typical for a general-purpose tantalum in this case size.
Case size and board footprint
This is the common 2917 footprint — the same pad layout used by the AVX TPS series D case and the industry-standard EIA-7343-31. The ±20% tolerance is the standard for tantalum electrolytics in this class — sufficient for bulk decoupling and hold-up capacitors where the exact capacitance is less critical than the ESR and voltage rating.