ESR and ripple current handling
The TPSC156K025H0300: The 300 mOhm ESR at 25 V and 15 µF sets the self-heating limit under ripple current. For a typical buck converter output, the ripple current squared times ESR gives the internal temperature rise; keeping that rise below 10°C at 125°C ambient requires the ripple current to stay under roughly 180 mA RMS. This part carries a molded case that sheds heat better than a dipped tantalum, so the hot-air station profile for rework should follow the 260°C peak, 30-second-above-217°C JEDEC profile for a 2.8 mm seated height part.
At -55°C the capacitance drops roughly 10% from the 25°C value; at 125°C the leakage current rises but stays within the 0.01 CV limit typical of the TPS series.