The TPSC336K020R0300: This is a molded tantalum capacitor from the KYOCERA AVX TPS series, rated 33 µF at 20 V with a 300 mOhm ESR and ±10% tolerance. The 20 V rating gives 25 % headroom on a 16 V rail — enough margin to keep the part inside its safe operating area during start-up transients without oversizing to 25 V. The 300 mOhm ESR is the key number for a DC-DC output filter: it sets the ripple current the capacitor can handle before self-heating becomes a concern. At 100 kHz switching, a 1 A ripple current through 300 mOhm dissipates 300 mW — the part's thermal impedance to the board determines whether that stays below the 125 °C ceiling.
Package and temperature — board-fit checklist
The capacitor is housed in a 2312 (6032 Metric) molded case, size code C, measuring 6.00 mm x 3.20 mm with a seated height of 2.80 mm max. The ±10% tolerance is standard for bulk decoupling and filter roles; it is not a precision timing cap.