Endurance is specified at 2000 hours at 125°C — the derating guideline for tantalum capacitors recommends staying below 80% of rated voltage at 125°C to achieve this lifetime. A 20 V part at 16 V applied voltage is a common derating target.
D case, 2917 (7343 metric) footprint: 7.30 mm x 4.30 mm, seated height 3.10 mm max. The D case is a common size for 15-47 µF tantalum capacitors at 20-35 V — the PCB land pattern is standard across AVX, Kemet, and Vishay D-case parts.
