Active production — where this part sits in the cycle
The TPSE687M002R0050: For a shortage-desk buyer this means the part is still flowing through franchised channels; the spot premium, if any, reflects allocation pressure rather than end-of-life scarcity.
680 µF at 2.5 V with a 50 mOhm ESR places this cap squarely in the bulk decoupling role for a 1.8 V or 1.2 V rail — the low ESR keeps ripple voltage under control while the high capacitance handles transient load steps from a processor or FPGA core. The 50 mOhm figure is the max ESR at 100 kHz and 25 °C; expect it to rise with temperature, so budget margin for the hot-corner case. The molded TPS series is KYOCERA AVX's low-ESR tantalum platform, designed for power-supply output filtering where aluminium electrolytics would be too tall or too inductive.
Temperature grade and operating envelope
Rated -55 °C to +125 °C — full military temperature range. That means the cap holds its capacitance and ESR within spec across the entire industrial and automotive ambient band, including cold-crank and under-hood conditions. The ±20% tolerance is standard for tantalum electrolytics; for a rail that needs tighter regulation, either derate the nominal capacitance or add a small ceramic in parallel to handle the high-frequency ripple the tantalum's ESR cannot absorb.