Bulk decoupling for a 4 V rail — 330 µF with 300 mOhm ESR
This TAJC337K004RNJ is a molded tantalum capacitor from the TAJ series, rated 330 µF at 4 V with ±10% tolerance and 300 mOhm ESR. The 300 mOhm ESR sets the ripple-current heating limit — for a 4 V rail carrying ripple, the internal temperature rise stays under control, but at higher ripple the self-heating cuts into the 125 °C ceiling.
Military temp range — -55 to 125 °C
The molded case and 2312 footprint (6.00 mm x 3.20 mm, 2.80 mm seated height) keep the part surface-mount compatible with standard reflow profiles.
