22 µF bulk decoupling for a 10 V rail — what the ESR tells you
The TAJT226M010RNJ: This is a 22 µF molded tantalum capacitor rated at 10 V with a 2.2 Ohm ESR. The 2.2 Ohm ESR is the number that matters for ripple current handling: at 100 kHz, the self-heating from ripple current is I² × 2.2 Ohm.
This part can sit in an engine-bay ECU, an avionics LRU, or a downhole instrument without a temperature derating step. The capacitance tolerance is ±20% across the entire range — the ESR will climb at cold temperature, but the capacitance stays within the bin.
The product status is Active. There is no last-time-buy window to watch, no NRND flag.
1411 / 1210 case — footprint and clearance
The case is 1411 (3528 Metric) / 1210, measuring 3.50 mm x 2.80 mm with a seated height of 1.20 mm. The 1210 pad layout is common; the low profile fits under a 1.5 mm clearance on a densely populated board. The manufacturer size code is T.