6.8 µF, 20 V, 1 Ohm ESR — Molded Tantalum in 1206
The TPSA685M020R1000 is a molded tantalum capacitor from KYOCERA AVX's TPS series, rated at 6.8 µF with ±20% tolerance and a 20 V DC voltage rating.
At 125°C, the voltage derating curve in the TPS series datasheet recommends staying below 2/3 of rated voltage for reliability — for this 20 V part, that means a 13 V DC bias maximum at the high end. The molded construction seals the element against moisture ingress, which is critical for conformal-coated or high-humidity assemblies.