The 1206 (3216 Metric) surface-mount package and 2.2 Ohm ESR make it a standard choice for decoupling and filtering on power rails in industrial and automotive-grade circuits. The molded construction provides mechanical stability and moisture resistance for reflow assembly.
In a 3.3 V to 1.8 V point-of-load filter, this ESR contributes roughly 22 mV ripple per 10 mA of AC current — acceptable for most digital loads but worth checking against the rail's noise budget. Capacitance drops with temperature and DC bias; at 125°C and 10 V bias, a 10 µF tantalum typically measures closer to 8 µF. The ±20% tolerance already accounts for this drift, but the effective capacitance at temperature should be confirmed against the minimum required for the application.