The 300 mOhm ESR keeps ripple current handling predictable in power-supply output filters and decoupling networks. The D case (2917 metric, 7.30 mm x 4.30 mm footprint) is a common size for medium-density board layouts.
Surface-mount package in 2917 (7343 Metric) case code. The 0.122-inch seated height fits standard clearance profiles. No special reflow profile beyond standard tantalum recommendations — the molded body handles typical lead-free soldering temperatures.
