KYOCERA AVX TPSA685K020R1000 is a molded tantalum capacitor rated 6.8 µF at 20 V with ±10% tolerance, housed in the 1206 (3216 Metric) case size. The 1 Ohm ESR sets the ripple current ceiling — at 100 kHz the capacitor dissipates I² × 1.0 W per amp of ripple, so the thermal rise in the 1206 body limits the usable AC current to roughly 300 mA RMS before self-heating pushes the core above 125 °C.
1206 footprint — board layout constants
The 1206 case measures 3.20 mm × 1.60 mm with a seated height of 1.80 mm max — the pad geometry matches the standard 1206 solder-land pattern, so no footprint change from a generic 1206 ceramic capacitor. Surface-mount assembly on a 1.6 mm FR-4 board with a 0.15 mm stencil; the molded body is compatible with reflow profiles per J-STD-020 at MSL 3 (moisture sensitivity level confirmed by the TPS series datasheet).