The TAJD475K050H: This is a 4.7 µF molded tantalum capacitor rated at 50 V DC, with ±10% tolerance. At 50 V, a 30 V rail is well within the safe zone. The 1.4 Ohm ESR (Equivalent Series Resistance) is the number that matters for ripple current and self-heating. In a switching regulator output filter, that ESR sets the output ripple voltage and the cap's internal temperature rise. For a 4.7 µF part, 1.4 Ohm is typical for a 50 V rated tantalum in this case size.
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You can design this into new builds without worrying about an imminent obsolescence flag.
The 2917 (7343 Metric) case is a standard footprint; the D size code means 7.30 mm x 4.30 mm x 3.10 mm max seated height.