The TAJD475K050HNJ is a molded tantalum capacitor from the TAJ series, rated 4.7 µF at 50 V with ±10% tolerance.
ESR and its effect on your circuit
The 1.4 Ohm ESR is the spec that matters for ripple filtering — lower ESR reduces self-heating and improves high-frequency decoupling.
Surface-mount in a 2917 (7343 Metric) package, size code D, measuring 7.30 mm x 4.30 mm with a seated height of 3.10 mm. The molded body has a clear polarity mark — the anode band is on the top — so orientation is easy to verify under a microscope or during rework.