The TAJB226K020H: The 1.8 Ohm ESR sets the ripple current handling and output voltage ripple — for a buck converter output, the ripple voltage is 1.8 Ohm × the inductor ripple current.
Temperature range and tolerance for harsh environments
±10 % tolerance means the actual capacitance stays within a predictable range across the temperature range — tight enough for timing circuits and filter poles.
Footprint and case size for PCB layout
Size B case (1411 / 3528 Metric) — the land pattern is 3.50 mm × 2.80 mm with a seated height of 2.10 mm max, matching the standard AVX TAJ B-size footprint. Surface-mount molded package — no exposed metal on the sides, so the capacitor is self-shielding against solder wicking and tombstoning during reflow.