The TPSE687K006R0060: That ESR figure is the one that governs ripple current handling and output noise on a switching regulator rail — a 60 mOhm part at 680 µF can absorb more ripple current than a higher-ESR equivalent before self-heating becomes a derating issue. Tolerance is ±10%, tighter than the ±20% typical for many tantalum electrolytics, which matters when the output capacitor sets the feedback-loop crossover in a POL converter.
Temperature range and what it means for the board
The molded construction gives it mechanical stability across that range — no conformal-coat weep or can swell at high temp, unlike some wet tantalums. At 125°C the voltage derating curve applies; KYOCERA AVX recommends derating to 50% of rated voltage for best reliability in high-temperature or high-surge applications. The 60 mOhm ESR is specified at 25°C and 100 kHz — expect it to rise by roughly 1.5× at -55°C and drop slightly at 125°C, per typical tantalum ESR vs temperature behavior.
For volume BOM positions, the TPS series is a standard KYOCERA AVX line, so lead times are typically predictable through the factory channel.