The TAJR475K006RNJ: This is a KYOCERA AVX TAJ series molded tantalum capacitor with 4.7 µF capacitance, ±10% tolerance, and a 6.3 V DC rated voltage. The 0805 (2012 Metric) case size is common for compact decoupling on power rails and signal filtering in space-constrained boards. At 125°C the voltage derating curve applies — typically 50% of rated voltage for tantalum capacitors above 85°C, so the effective working voltage at 125°C is 3.15 V.
7 Ohm ESR — ripple current and thermal budget
ESR is specified at 7 Ohm. For a 4.7 µF capacitor at 100 kHz, this ESR translates to a dissipation factor around 6% and limits the ripple current to roughly 200 mA RMS before self-heating becomes significant. In a low-ripple decoupling role (e.g., bypassing a digital IC's Vdd pin) the 7 Ohm ESR is adequate; for high-ripple bulk filtering a lower-ESR tantalum or ceramic is preferred.
The product status is Active.