The TAJA475J020RNJ is a molded tantalum capacitor from the TAJ series, rated 4.7 µF at 20 V with ±5% tolerance. The 1206 case (3.20 mm x 1.60 mm footprint) is a common size for board-level decoupling, filtering, and energy storage in circuits that need a stable capacitance over temperature. In a DC-DC output filter, this ESR will contribute to the output ripple voltage — the voltage ripple equals the inductor ripple current multiplied by the ESR. For a 100 mA ripple, that is 400 mV of ripple, which may be too high for a sensitive analog rail without additional post-filtering.
No surplus or spot-market premium applies unless the order volume exceeds typical distributor stock depth.
Package and footprint — 1206 surface-mount
The 1206 (3216 Metric) case measures 3.20 mm x 1.60 mm with a seated height of 1.80 mm max.