The TAJP475K016RNJ: This is a molded tantalum capacitor from the KYOCERA AVX TAJ series, rated 4.7 µF at 16 V with ±10% tolerance.
5 Ohm ESR — what it means for ripple and heating
The 5 Ohm ESR is the series resistance that limits ripple current and generates self-heating. For a 4.7 µF cap on a low-frequency decoupling node (e.g., a linear regulator output) the ESR is fine. On a switching converter output with high-frequency ripple, the 5 Ohm ESR will dissipate noticeable heat — check the ripple current rating in the full datasheet before committing.
This part can be designed into new builds without a last-time-buy timeline.
0805 case — board layout fit
0805 (2012 Metric) footprint, 2.05 mm x 1.30 mm, seated height 1.50 mm max. The size code P matches the standard 0805 land pattern. Reflow profile follows standard tantalum recommendations — preheat ramp limited to 150°C/s to avoid thermal shock to the manganese dioxide dielectric.