22 µF at 10 V — the rail cap that covers the full temp band
The TAJC226M010RNJ: The 1.8 Ohm ESR sets the ripple current ceiling and the self-heating under AC load — for a 100 kHz buck output, the ripple voltage across this cap is 1.8 Ohm times the inductor ripple current, so the output ripple stays predictable without an additional low-ESR ceramic in parallel. Rated from -55 to +125 °C, the cap holds its full rated voltage across the military temperature band — no voltage derating needed for an avionics or downhole board that sees -40 °C cold soak or 105 °C ambient.
Case C footprint and board fit
Package is 2312 (6032 metric), size code C — 6.00 mm × 3.20 mm footprint with a seated height of 2.80 mm max. The molded case has no exposed metal on the sides, so adjacent caps can sit at the standard 0.5 mm clearance without shorting risk.
Active production — no end-of-life clock
The TAJ series is a broad molded tantalum family; the C case and 22 µF / 10 V combination is a common value, so cross-sourcing from multiple distributor lots is straightforward at RFQ.