50 ns recovery — why it matters for the switching loop
That 50 ns trr is what separates this part from a standard recovery diode — it lets the diode snap off quickly when the voltage reverses, cutting the reverse-recovery charge that otherwise heats up the switching transistor. In a continuous-conduction-mode PFC boost stage or a 100 kHz flyback, that 50 ns trr keeps the switching losses in the MOSFET under control.
175 °C junction — thermal budget for compact supplies
That extra 25 °C headroom matters when the diode is packed into a sealed LED driver or an enclosed AC-DC module where the ambient inside the box hits 85 °C or more. The forward voltage drop is 1.7 V at 2 A, so at full load the diode dissipates about 3.4 W — the SMA package's thermal resistance to ambient will be the limiting factor, not the silicon.
No last-time-buy notice, no end-of-life forecast.