The TAJB107K006RNJ is a molded tantalum capacitor from the TAJ series, delivering 100 µF capacitance at 6.3 V rated voltage with ±10% tolerance. The 1.7 Ohm ESR sets the ripple current ceiling and self-heating limit — for a 100 µF part at this voltage rating, that ESR is typical for the B case size (1411 / 3528 Metric).
The 1411 (3528 Metric) footprint is shared with many standard tantalum capacitors; confirm the pad layout matches your PCB land pattern before committing. The B case code (3.50 mm x 2.80 mm x 2.10 mm max seated height) is a common size, so board layout reuse across multiple capacitance values in the same series is straightforward.