The TAJA684M020SNJ: This is a molded tantalum capacitor from the TAJ series, rated 0.68 µF at 20 V with ±20% tolerance. The -55 to +125°C operating range covers the full industrial and military temperature envelope — it holds capacitance over temperature better than a ceramic X7R in the same 1206 case, which derates sharply above 85°C. For a decoupling or timing cap on a board that sees -40°C cold starts or 105°C ambient, this part keeps the value within spec.
1206 case size and footprint fit
The 1206 (3216 Metric) package measures 3.20 mm x 1.60 mm with a seated height of 1.80 mm. The size code A footprint matches standard 1206 solder pads — no layout change from a ceramic cap of the same case. The molded body gives a flat top for pick-and-place nozzle pickup and good stack-up height consistency.