The TAJA106M010TNJ: The ±20 % tolerance is typical for tantalum; the actual capacitance at the bias voltage will be lower, so budget the effective capacitance at 8 µF for decoupling calculations.
Automotive-grade — AEC-Q200 and 125 °C endurance
Lifetime is specified at 2000 hours at 125 °C — the endurance floor. At lower temperatures the lifetime extends; at 85 °C the expected life roughly doubles per 10 °C drop.
ESR and the 1206 footprint
3 ohm ESR at 100 kHz is the limiting factor for ripple current in a switching regulator output — a 100 kHz ripple of 200 mA pk-pk dissipates 0.12 W in the cap, which is within the 1206 package's thermal budget but leaves little headroom. The 1206 case (3.20 mm x 1.60 mm, seated height 1.80 mm) is a common footprint for automotive modules — the small size suits space-constrained ECU boards, but the ESR limits the ripple current compared to a larger case.
Active — no last-time-buy scramble
The part is in production and can be quoted to order for new designs or BOM replenishment.