Molded tantalum, 10 µF at 20 V — what the ESR tells you
The 1 Ohm ESR is the number that governs ripple current handling and self-heating in a DC-DC output filter — at 20 V and 10 µF, expect ripple voltage roughly 1 mV per amp of ripple current through the ESR alone.
Package and footprint — 1411 / 1210 case
The capacitor ships in a 1411 (3528 Metric) / 1210 case, measuring 3.50 mm x 2.80 mm with a seated height of 2.10 mm max. Manufacturer size code B.
The product status is Active, meaning KYOCERA AVX continues to manufacture this order code with no announced end-of-life. No official successor or second-source is listed — the TPS series is the current production family.