The TAJY226K020RNJ: 22 µF at 20 V — the 20 V rating gives a 33 % derating margin on a 12 V rail, which is the typical guideline for tantalum capacitors to avoid surge failures. 900 mOhm ESR at 100 kHz — this sets the ripple current capability.
Package footprint and board layout
2917 (7343 Metric) case, 7.30 mm × 4.30 mm, seated height 2.00 mm max. Size code Y. The 0.079" (2.00 mm) height fits under low-profile components on a dense PCB. Molded case — the epoxy encapsulation resists moisture and mechanical stress better than conformally coated parts, but the MSL level should be confirmed from the lot date code for reflow profiling.