The TAJA226M006SNJ is a 22 µF molded tantalum capacitor rated at 6.3 V with a 3 Ohm ESR at 100 kHz. That ESR figure is the key number for a decoupling application: it limits the ripple current the capacitor can sink before self-heating becomes a concern. The 1206 case (3.20 mm x 1.60 mm) and 1.80 mm seated height fit the standard footprint for this package size.
This capacitor can sit on a board that sees cold-soak at -55°C and still deliver its rated capacitance at the low end, while the 125°C ceiling matches the hot end of an engine-bay or downhole environment.
±20% tolerance — plan the rail ripple budget
For a 22 µF part, the actual capacitance can be as low as 17.6 µF or as high as 26.4 µF. When this capacitor is used as the output filter on a low-dropout regulator, the worst-case minimum capacitance must still meet the regulator's stability requirement. The 3 Ohm ESR also contributes to the output ripple voltage — the product of the ripple current and ESR gives the AC voltage drop across the capacitor, which the downstream load sees.