The TAJB155M035RNJ: This is a molded tantalum capacitor in the TAJ series, rated 1.5 µF at 35 V with ±20% tolerance. The 35 V rating gives 50 % derating margin on a 24 V rail — standard practice for tantalum capacitors to avoid the surge failure mode. The B case (3.50 mm × 2.80 mm) fits a 1411 / 3528 Metric footprint. The 5.2 Ohm ESR sets the ripple-current ceiling: the maximum allowable AC current before the part self-heats above the derating limit is limited by this resistance. Below that, the part runs cool; above it, internal temperature rise accelerates wear-out.
Active production — no last-time-buy chasing
The product status is Active, meaning KYOCERA AVX continues to manufacture this order code.