6.8 µF at 16 V — the decoupling pocket for 12 V rails
This TAJA685K016RNJ is a molded tantalum capacitor from the TAJ series, rated 6.8 µF at 16 V with ±10% tolerance. The 3.5 Ohm ESR sets the ripple-current ceiling — on a 12 V rail with a few hundred mA of switching ripple, the self-heating stays within the 125°C limit.
Active — no LTB clock ticking
1206 case, size code A — board-fit check
Manufacturer size code A, measuring 3.20 mm x 1.60 mm with a seated height of 1.80 mm max. The 1206 footprint is standard — no via-in-pad or fine-pitch reflow profile needed.