2.2 µF at 35 V — the derating floor matters
The TAJA225M035RNJ: This is a 2.2 µF ±20% molded tantalum capacitor rated at 35 V, built in the TAJ series by KYOCERA AVX. The 4.5 Ohm ESR sets the ripple current ceiling — for a 2.2 µF cap at 35 V, the self-heating from ripple stays manageable as long as the AC current through the part stays under ~70 mA RMS at 25°C.
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