The TAJP475K016A is a molded tantalum capacitor from KYOCERA AVX's TAJ series, rated at 4.7 µF with ±10% tolerance and a 16 V working voltage. Its 0805 (2012 Metric) case and surface-mount construction suit it for general-purpose decoupling, filtering, and energy storage on dense PCBs where space is tight.
ESR and its impact on circuit design
With a 5 Ohm ESR, this capacitor's self-heating under ripple current is manageable for low-frequency decoupling, but the ESR limits the ripple current rating — a 100 kHz switching regulator with high AC current may need a lower-ESR polymer or MLCC alternative.