1 µF, 20 V, ±10% — core decoupling fit
The TAJA105K020SNJ: Rated 1 µF at 20 V with ±10% tolerance, this molded tantalum fits low-voltage DC rails where a 1206 footprint is preferred — the 20 V rating provides derating margin on a 12 V or 5 V bus, keeping the capacitor inside its safe operating area.
9-ohm ESR at 100 kHz
ESR is specified at 9 ohms at 100 kHz — the ripple current capability is limited by this value, so the capacitor is best used in lower-frequency decoupling or bulk storage rather than high-ripple switching regulator outputs.