The TAJA155K020RNJ: Active lifecycle status — no last-time-buy window to track.
The 1.5 µF capacitance and 20 V rated voltage put this in the sweet spot for 12 V rail decoupling or output filtering on a 5 V-to-12 V boost converter. The 20 V rating gives 67 % headroom above a 12 V bus — enough to survive typical 5 % overshoot without derating the part. ESR is 6.5 Ohm — typical for a small-case tantalum, limiting ripple current before self-heating becomes a concern. The molded construction gives better mechanical stability than conformally coated chips in high-vibration assemblies.
Package and footprint — 1206 case, size code A
The 1206 (3216 Metric) case measures 3.20 mm x 1.60 mm with a seated height of 1.80 mm max. Size code A — the smallest case in the TAJ series.