What the AEC-Q200 rating means on this TAJ cap
This TAJB475K035TNJ carries an AEC-Q200 qualification — the automotive passive-component stress test that covers temperature cycling, moisture resistance, and mechanical shock beyond the commercial TAJ baseline. For a repair bench, that means this cap was built to survive the thermal swings and vibration of an engine bay or transmission control module, not just a climate-controlled cabin.
Ripple current and ESR at 100 kHz
The 3.1 ohm ESR at 100 kHz is the number that tells you how much ripple current this cap can handle before self-heating eats into the 2000-hour lifetime at 125°C.
The TAJ series has been in continuous production for decades, so date-code consistency across reel splits is generally good, but confirm the reel date code if the board is headed for a PPAP submission.