The TPSC476M016S0350: Design it into new BOMs without a migration clock ticking.
47 µF, 16 V — the bulk decoupling sweet spot
47 µF at 16 V rated sits in the common bulk-capacitance range for 3.3 V and 5 V rails, providing enough charge reservoir to hold up a fast load step. The ±20% tolerance is standard for tantalum electrolytics — the actual capacitance at the DC bias voltage will be lower, so budget the derating. 350 mOhm ESR at 100 kHz means the capacitor can handle ripple current without excessive self-heating — for a 100 kHz buck converter output, the ripple current rating is roughly sqrt(0.1 / 0.35) = 0.53 A RMS, assuming a 0.1 W dissipation limit. Stay below that to keep the core temperature rise under control.
Molded case, full military temperature range
The molded 2312 (6032 Metric) case with size code C is a standard surface-mount footprint — same pad layout as the AVX TAJ and TPS families.