10 µF, 16 V tantalum – what it fits
The TAJC106K016HNJ: This is a 10 µF, 16 V molded tantalum capacitor from the TAJ series, in a 2312 (6032 Metric) case with size code C. The ±10% tolerance covers the common decoupling and bulk-storage needs on a 12 V or 5 V rail, where the 16 V rating gives about 30% headroom above a 12 V supply — enough to handle mild ripple without derating stress.
Temperature range and ESR
The 2 Ohm ESR is typical for a C-case tantalum at this capacitance — it sets the ripple current capability and the self-heating under AC load; for a 100 kHz switcher output, that ESR means the capacitor dissipates about 0.1 W at 250 mA ripple, which is manageable in free air.