What this 35 ns fast recovery rectifier does for your power stage
The 35 ns trr cuts switching losses in continuous-conduction-mode PFC stages and flyback snubbers, where a slow diode would overheat the junction. The 850 mV forward drop at 8 A keeps conduction losses manageable for a 10 A rated device in a D2PAK package. The common-cathode pair matches center-tapped secondary windings and half-bridge topologies without an extra discrete diode.
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D2PAK footprint and thermal design
The tab is the common-cathode node and carries the bulk of the heat. A proper via-stitched copper pad under the tab is required to keep junction temperature below the 150°C maximum when running 10 A per diode. The D2PAK footprint is standard across the industry, so a board designed for this part can accept pin-compatible fast-recovery dual diodes from other manufacturers if a second source is needed.