0.22 µF, 20 V — molded tantalum for tight board spots
The TAJR224K020RNJ: This is a KYOCERA AVX TAJ-series molded tantalum capacitor, 0.22 µF at 20 V with ±10% tolerance, in an 0805 case — a common footprint for decoupling and timing circuits where board real estate is tight. The 25 Ohm ESR is the key design input: at 0.22 µF, the impedance at 100 kHz is dominated by the ESR, not the capacitive reactance, so the ripple attenuation is resistive-limited. Budget this into your decoupling network — a lower-ESR tantalum or MLCC may be needed if the ripple current exceeds the cap's dissipation factor.