22 µF, 25 V, 1.4 Ohm ESR — the decoupling numbers that matter
The TAJC226K025HNJ: This is a 22 µF ±10% molded tantalum capacitor rated at 25 V, in the C case (2312 / 6032 Metric) from the TAJ series. The 1.4 Ohm ESR at 100 kHz sets the ripple current ceiling — for a 500 kHz switching regulator output, the capacitor's self-heating stays within the 2000-hour endurance at 125°C as long as the ripple current stays under the calculated limit from the ESR and the rated power dissipation.
Temperature range and endurance — full mil temp, 2000 h at 125°C
The 2000-hour endurance at 125°C means the capacitor is derated for continuous operation at the top end; a 50°C ambient will see the lifetime extend well beyond the rated hours.
This is a standard catalog tantalum — no last-time-buy window, no NRND flag.