The TAJA105K035HNJ is a 1 µF, 35 V rated molded tantalum capacitor from the TAJ series, in a standard 1206 (3216 Metric) surface-mount package. The 35 V rating gives you a 2× derating margin on a 12 V rail and still holds margin on a 24 V bus — a common practice to avoid tantalum field failures from voltage surges. The ±10% tolerance is tight enough for most decoupling and timing applications; the 7.5 Ohm ESR at 100 kHz sets the ripple current ceiling and the self-heating under AC load.
The TAJ series is a mature, widely second-sourced family; the molded 1206 footprint is a standard industry size, so a cross-reference to another manufacturer's 1 µF 35 V 1206 tantalum is straightforward if supply tightens.