What this cap does on a low-voltage rail
The TPSD227K006S0100: 220 µF at 6.3 V with 100 mOhm ESR — this is a bulk decoupling cap for a 3.3 V or 5 V rail where you need to absorb transient current spikes without the voltage droop exceeding the load's tolerance. The 100 mOhm ESR keeps the ripple voltage under control at moderate switching frequencies; for a buck converter switching at 300 kHz, the ripple current rating of the cap (not listed here) should be checked against the converter's inductor ripple current. Molded case, size code D — 7.30 mm x 4.30 mm footprint, 3.10 mm seated height. Fits the standard 2917 (7343 Metric) land pattern; no via-in-pad needed, but the cathode end (marked with a stripe) must face the pad's polarity mark. Polarity is critical — reverse voltage will vent the cap.
Temperature grade — military range, not just industrial
This is the full military temperature band — the cap keeps its capacitance and ESR within spec from a cold-soaked avionics bay at -55°C to a hot engine-bay ECU at 125°C. The 6.3 V rating derates with temperature; at 125°C the applied voltage should stay below 50% of rated (3.15 V) for reliable operation per MIL-PRF-55365 guidelines.
Lifecycle — active, no end-of-life notice
This cap can be designed into new builds and sourced for ongoing production.