Selection mistake this part avoids
The TAJR475M002RNJ: A 4.7 µF tantalum capacitor with a 2.5 V rating and 20 Ohm ESR in an 0805 case — the ESR is the limiting factor for ripple current in a decoupling application. If your BOM calls for a low-impedance bulk cap on a 1.8 V rail, this part's 20 Ohm ESR will dissipate more heat than a polymer or low-ESR tantalum alternative; the selection mistake is assuming all 4.7 µF caps are interchangeable.
ESR and temperature derating
For a 4.7 µF part, the ripple current rating is typically 0.1 A to 0.2 A RMS — confirm the application's ripple current against the manufacturer's derating curve before committing the BOM.