What this TPS tantalum does on the board
The TPSC685M035R0350: This is a molded tantalum capacitor from the KYOCERA AVX TPS series, rated 6.8 µF at 35 V with ±20% tolerance.
Temperature range and case size
Spans -55 to +125 °C, so it handles engine-bay ambient or outdoor telecom gear without derating the voltage at the high end. The C case (2312 / 6032 metric) measures 6.00 mm x 3.20 mm with a seated height of 2.80 mm — a common footprint for medium-density board layouts where a D case would crowd adjacent passives.