The TAJD475K050TNJV: This part carries AEC-Q200 qualification — the automotive passive-component stress-test standard. For a sourcing buyer, that means the capacitor has passed the full suite of reliability tests (temperature cycling, moisture resistance, mechanical shock, vibration) required by Tier-1 automotive OEMs. It is not just 'automotive-capable'; it is qualified, with the PPAP documentation chain that a production release demands. Combined with 2000 hours lifetime at 125°C, this capacitor supports the endurance requirements of powertrain, transmission, and body-control modules.
50 V rated voltage in a 2917 case — the fit decision
At 4.7 µF and 50 V rated voltage, the TAJD475K050TNJV occupies the 2917 (7343 Metric) footprint — the D case size in the TAJ series. The 1.4 Ohm ESR at 100 kHz is a direct input to ripple current calculations in DC-DC converter output filters; a lower ESR would reduce ripple voltage at the same ripple current, but the 1.4 Ohm figure is typical for a 50 V tantalum in this case size and is adequate for many automotive bus decoupling applications.