The TAJD157K006TNJV: This is a molded tantalum capacitor from the TAJ series, rated 150 µF at 6.3 V with ±10% tolerance. The 2917 (7343 Metric) case is the standard D-size footprint for a 12 V input rail or a 3.3 V post-regulator bulk cap in an automotive ECU. AEC-Q200 qualification means it passed the full automotive stress suite — temperature cycling, moisture resistance, mechanical shock, and vibration — so it belongs on a BOM for an engine-bay controller or a cabin-domain module without a separate qualification waiver.
Lifetime and ESR at 125°C
Rated 2000 hours at 125°C — the typical endurance floor for a molded tantalum in a hot environment. If the board sits near a power stage or under the hood, derate the voltage by 20% to stretch the life beyond the datasheet minimum. ESR is 900 mOhm at 100 kHz. That is moderate for a 150 µF tantalum; it limits the ripple current to roughly 0.5 A RMS at 125°C before self-heating cuts the lifetime. For a switching regulator input, pair it with a low-ESR ceramic cap to share the ripple current.