The TAJA685K020TNJ: This is a 6.8 µF, 20 V molded tantalum capacitor from the KYOCERA AVX TAJ series, rated with a ±10% tolerance. It carries AEC-Q200 qualification — the automotive passive-component stress test — which means it has passed temperature cycling, moisture resistance, and vibration prequalification required for OEM PPAP submissions.
1206 footprint, ESR, and layout fit
The manufacturer size code A confirms the 3.20 mm × 1.60 mm land pattern — a direct drop-in for any 1206 tantalum footprint on the board. ESR is specified at 2.4 Ohm — this is the series resistance that governs ripple current handling and output voltage ripple in DC-DC converter input/output filters. For a 6.8 µF cap at 20 V, the 2.4 Ohm ESR is typical for a small-case tantalum; if lower ripple is needed, a larger case size or polymer alternative should be evaluated.