68 µF, 10 V, 300 mOhm — sizing a bulk tantalum for a low-impedance rail
The TPSC686K010R0300 is a molded tantalum capacitor from the TPS series, rated 68 µF at 10 V with ±10% tolerance and 300 mOhm max ESR at 25 °C and 100 kHz. That ESR figure is the one that matters for ripple current handling: at 68 µF and 300 mOhm, the self-heating at rated ripple is modest, but if your rail sees high-frequency ripple above 100 kHz, the ESR starts climbing and the cap runs warmer than the DC spec suggests.
The TPS series is a general-purpose line, so the -55 °C floor means the capacitance drop at cold is well-characterized — expect ~20 % dip at -55 °C relative to 25 °C, typical for tantalum.
The TPS series is a broad production line, so reel quantities are routinely available through independent distribution.
Molded case, size C — footprint fits 6.00 x 3.20 mm land pattern
Package is a molded 2312 (6032 metric) case, size C per manufacturer code. The footprint is 6.00 x 3.20 mm with a seated height of 2.80 mm max. Reflow profile follows standard tantalum guidelines — peak temperature 260 °C, but the molded body absorbs moisture, so a 24-hour bake at 125 °C before reflow is recommended if the tape has been opened.