Capacitance and voltage rating — BOM fit check
The TAJC225M050RNJ delivers 2.2 µF capacitance at 50 V rated voltage in a molded tantalum construction — the C-case (2312 / 6032 Metric) footprint is the standard for this density and voltage class, and the ±20 % tolerance is typical for tantalum electrolytics in bulk decoupling and hold-up applications. At 50 V rated, the derating rule for tantalum caps means this part is comfortable on rails well below the maximum — confirm the steady-state DC bias stays within reliable limits for long-term use.
ESR and temperature — what they mean on the board
The 3 Ohm ESR at room temperature is the self-heating limit for ripple current — a 2.2 µF cap at 50 V with this ESR handles ripple within the thermal budget for typical decoupling and hold-up roles.