What this MnO2 tantalum capacitor is
The TAJB685K010ANJ is a MnO2 tantalum capacitor from KYOCERA AVX, supplied in a Tape & Reel (TR) package. The MnO2 cathode construction gives it a stable capacitance over temperature and voltage compared to polymer types — something to keep in mind if the board sees wide thermal cycling or if the bias voltage varies in operation.