Zero trr — the switching-loss killer
In a hard-switched PFC boost stage or LLC converter, that eliminates the reverse-recovery loss that dominates silicon ultrafast diode dissipation above 50 kHz.
650 V / 12 A — where it sits in the power stage
Rated for 650 V reverse voltage and 12 A average forward current, this diode fits the output rectifier slot in a 1–2 kW PFC stage or the secondary-side freewheeling diode in a 500 W–1 kW LLC converter. The 1.45 V forward voltage at 12 A is the conduction loss floor; the 150 µA reverse leakage at 650 V is low enough to keep the off-state thermal contribution negligible at 175 °C junction.
175 °C junction — sealed-enclosure margin
In a sealed power supply with no forced air, the 175 °C ceiling gives headroom for the diode to run at 12 A while the ambient inside the enclosure climbs toward 85–105 °C. The D²PAK (TO-263) footprint on a 2 oz copper pad can sink the 17.4 W conduction loss at 12 A, provided the PCB copper area is sized per the thermal model.