The TPSD476K020R0075: The 20 V rating gives 60% derating on a 12 V rail — standard practice for tantalum reliability. The 75 mOhm ESR keeps ripple heating low and transient response tight, which matters when the load draws fast current steps. The D case (2917 / 7343 metric) footprint is common across multiple tantalum manufacturers, so pad layout is standard.
Rework and board-fit considerations
Molded epoxy case is more robust than conformal-coated tantalums — it handles hot-air rework without cracking if you preheat the board to 100°C and keep the nozzle temperature under 350°C. The D case has a clear polarity mark (band at the anode end), so orientation is easy to verify under a microscope. The ±10% tolerance is tight enough for most power supply feedback loops without needing a tighter bin.