The TAJB225K016RNJ is a molded tantalum capacitor from KYOCERA AVX's TAJ series, rated 2.2 µF at 16 V with ±10% tolerance. The 5.5 Ohm ESR is the key thermal parameter: at 2.2 µF and 16 V, this ESR limits the ripple current the capacitor can handle without self-heating. On a 5 V rail the 16 V rating gives over 3× derating, a solid margin against voltage transients.
Package footprint and board layout fit
Housed in the 1411 (3528 Metric) case, size code B, the body measures 3.50 mm x 2.80 mm with a seated height of 2.10 mm max.
No last-time-buy window or successor part number has been announced.