What this tantalum cap does on the board
The TAJR225M006RNJ: This is a molded tantalum capacitor from the TAJ series, 2.2 µF rated at 6.3 V, in an 0805 surface-mount package. The 20 ohm ESR is the number to watch — it limits how much ripple current the cap can handle before self-heating becomes a problem. On a decoupling rail, that ESR means the cap is better suited for bulk storage than for high-frequency bypass; keep a lower-ESR ceramic in parallel if the rail has switching noise.
Active production — no last-time-buy worry
For a repair bench or a production run, you can quote this part to order without hunting for obsolete surplus.