What this TPS tantalum cap brings to the board
The TPSD685M035S0500: The 500 mOhm ESR is the number that matters most for power rail decoupling — it sets the ripple current handling and the self-heating under AC load. In a 35 V rail, this cap sits comfortably below the derating guideline (typically 50% of rated voltage for tantalum), so you get the full capacitance without the voltage-surge risk that shortens tantalum life.
Package, temperature, and where it fits
Surface-mount reflow profile follows the standard tantalum ramp: peak 260°C, 30 seconds above 217°C.