Molded tantalum chip — 0.68 µF at 16 V, 0805 case
The TAJR684M016RNJ: This is a molded tantalum capacitor from the TAJ series, rated 0.68 µF with ±20% tolerance and a 16 V working voltage. The 0805 (2012 Metric) case keeps the footprint small — 2.05 mm x 1.30 mm — so it fits tight PCB layouts without sacrificing the voltage rating.
The 25 Ohm equivalent series resistance is on the higher side for a tantalum of this value. That limits how much ripple current the capacitor can handle before self-heating becomes an issue — use it for bulk decoupling or filtering where the AC current stays low, not for high-frequency bypass on a switching regulator output.
The molded construction keeps the element sealed against moisture ingress through those cycles.