220 µF at 10 V — ESR drives the thermal budget
The TPSE227K010T0100V: This is a general-purpose tantalum, not a low-ESR polymer type — the 100 mOhm ESR is typical for a standard MnO₂ cathode tantalum at this capacitance and voltage. For bulk decoupling on a 10 V rail feeding a 3.3 V regulator, the ripple current is usually under 500 mA, so the ESR contribution to output ripple stays below 50 mV.
Temperature range and board-fit
At 125°C the voltage derating curve applies — KYOCERA AVX recommends derating to 2/3 of rated voltage above 85°C, so at 125°C the applied voltage should not exceed ~6.7 V for reliable operation. This is a standard footprint shared with most 7343-31 tantalum caps — the pad layout matches the EIA 7343-31 case code, so a PCB already laid out for a 7343-31 tantalum accepts this part without a board spin.
Active lifecycle — sourcing posture
This is a standard production part in the TPS series, available through the usual KYOCERA AVX distribution channels. The ±10% tolerance and 100 mOhm ESR are the critical fit parameters; confirm the ripple current in your application stays within the derated limits at the operating temperature.