AEC-Q200 qualification and automotive deployment
For a buyer sourcing a 1-µF decoupling cap for an engine-control module or transmission controller, this qualification is the first gate: a non-automotive tantalum would fail the 1000-hour biased humidity test at 85°C/85% RH that AEC-Q200 mandates.
2000-hour endurance at 125°C
In a 105°C ambient (typical engine-bay soak), the capacitor's life doubles roughly for every 10°C below the rated temperature, so a 125°C-rated part at 105°C ambient should see 4000+ hours before the failure rate rises. The 9-ohm ESR at 100 kHz means self-heating from ripple current will reduce that margin; a 100-mA ripple current at 100 kHz dissipates 90 mW, raising internal temperature by several degrees.