Bulk decoupling for power rails up to 10 V
The KYOCERA AVX TPSX107M010R0085 is a molded tantalum capacitor in the TPS series, offering 100 µF capacitance at a 10 V rated voltage. That 85 mΩ ESR (equivalent series resistance) is the number that matters most for power rail filtering — it sets the ripple current ceiling and the self-heating under load. The 2917 (7343 Metric) case is the standard large-footprint tantalum size, so the pick-and-place setup is already in every contract assembler's library. Operating from -55°C to 125°C, it covers industrial enclosures and underhood automotive ECUs where the ambient hits triple digits.
ESR and temperature — the real selection gate
85 mΩ ESR at 100 kHz is the spec that governs how much ripple current this cap can sink before the internal temperature rise exceeds the derating curve. In a buck converter output stage, that ESR translates to a few hundred mA of ripple current capability — enough for a moderate-load POL regulator but not a high-current CPU core rail where you'd parallel multiple caps or switch to a polymer type. The -55°C to 125°C operating range means the capacitance and ESR stay within datasheet limits across the full automotive temperature grade. At cold start (-40°C) the ESR climbs — expect roughly 2x the 25°C value — so the ripple margin at low temperature needs a headroom check if the load is full current at first power-on.
Active production — no end-of-life scramble
Listed as Active by KYOCERA AVX, so no PCN or last-time-buy clock is ticking. The TPS series is a mature, high-volume tantalum line — second-source equivalents from Kemet and Vishay exist in the same 2917 case with similar ESR bands, though the exact 85 mΩ at 100 µF / 10 V cross-reference should be verified against the BOM's derating requirements.