680 µF bulk decoupling for a 6.3 V rail — ESR drives the ripple
The TPSV687M006R0040: The 40 mOhm ESR is the parameter that governs ripple current handling and output voltage ripple in a DC-DC converter — a lower ESR means less self-heating and a cleaner rail at the same ripple current.
2924 case, size code V — land pattern and board fit
The capacitor uses a molded 2924 (7361 Metric) case with manufacturer size code V. This is a surface-mount package — the land pattern on the PCB must match the 2924 footprint, and the 3.75 mm height clears most low-profile enclosures.
This covers industrial automation enclosures and automotive under-hood environments where ambient temperatures reach 105°C. The 125°C ceiling provides margin above the typical 85°C commercial-grade limit, though derating the applied voltage above 85°C is standard practice for tantalum reliability.
It is available in tape-and-reel (TR) or cut-tape (CT) packaging — the reel variant suits automated pick-and-place, while cut tape works for prototype or low-volume builds.