220 µF, 6.3 V, 125 mOhm — bulk decoupling for a 6.3 V rail
The TPSC227M006P0125 is a molded tantalum capacitor from the TPS series, rated 220 µF at 6.3 V with a maximum ESR of 125 mOhm. This combination suits it for bulk decoupling on a 6.3 V supply rail where low impedance at switching frequencies reduces ripple voltage. The 125 mOhm ESR keeps self-heating manageable under ripple current, but the capacitor's power dissipation limit still sets the maximum AC current — check the ripple-current derating curve for the ambient temperature.
At 125°C the voltage derating factor applies — KYOCERA AVX recommends derating to 50% of rated voltage above 85°C, so at 125°C the working voltage drops to 3.15 V.