Molded tantalum in a 1206 case
The TAJS105K016RNJ: This is a 1 µF, 16 V molded tantalum capacitor from the TAJ series, in a standard 1206 (3216 Metric) surface-mount package. The ±10% tolerance covers the general-purpose decoupling and filtering jobs this part is most often specified for.
Temperature range and ESR
The 15 Ohm ESR is on the higher side — expect more self-heating under ripple current than a low-ESR polymer part, so check the ripple current derating if the circuit runs near the temperature ceiling.