2.2 µF, 35 V — the BOM anchor for decoupling and filtering
The TAJC225K035HNJ is a 2.2 µF, 35 V molded tantalum capacitor from the TAJ series, in a 2312 (6032 Metric) case. ESR is 3.5 Ohm at 100 kHz — that figure sets the ripple current limit and self-heating; for a 100 kHz switcher output, the capacitor's own dissipation stays low enough that the 2000-hour lifetime at 125°C is the endurance ceiling, not the ESR.
