The 16 V rating gives 20 % derating margin on a 12 V rail and 3× margin on a 5 V rail — enough headroom to absorb switching transients without exceeding the voltage limit. The D-case (2917 / 7343 Metric) footprint is a standard tantalum land pattern, so the PCB layout matches existing D-case designs without a pad revision.
600 mOhm ESR and the AC loss budget
ESR is 600 mOhm — typical for a D-case tantalum at this capacitance and voltage. For a 100 kHz buck converter output, the ripple current squared times ESR sets the internal heating; a 600 mOhm ESR keeps the self-heating under 0.5 W at 500 mA ripple, which is within the D-case thermal limit at 85 °C ambient.
It suits avionics black boxes that cold-soak at -55°C on the tarmac and engine-bay electronics that see 125°C under the cowling.