The TAJE227M016HNJ is a molded tantalum capacitor from the KYOCERA AVX TAJ series, rated 220 µF at 16 V with ±20 % tolerance. The 500 mOhm ESR at 100 kHz is the dominant loss term for switching-regulator output filtering; at a 500 kHz switching frequency the ripple current heats the part by I² × ESR, so the ripple current rating is self-limiting. The E case (2917 / 7343 metric) is the standard footprint for this capacitance-voltage combination, and the full military temperature range (-55°C to 125°C) qualifies it for avionics, downhole, and satellite power rails where the ambient swings across the entire band.
2000-hour endurance at 125 °C — derating extends life
Derating the applied voltage extends the useful life beyond the 2000-hour test window.