Zero trr — the switching-loss killer
The IDH08SG60CXKSA2 is a 600 V, 8 A SiC Schottky diode from Infineon's CoolSiC™+ series. Its defining spec is zero reverse recovery time — the datasheet lists no recovery time above 500 mA forward current. That means no stored charge tail, which cuts switching losses and snubs the EMI spike that every ultrafast silicon diode leaves in the loop.
8 A continuous, 600 V blocking — where it lands in the power stage
Rated for 8 A average rectified current at 600 V DC reverse, this diode fits the boost leg of a continuous-conduction-mode PFC stage in the 500 W to 2 kW range, or the output rectifier in a flyback converter. The forward voltage drop is 2.1 V max at 8 A — higher than a silicon ultrafast, but the zero recovery loss more than compensates at switching frequencies above 50 kHz. Reverse leakage is 70 µA at 600 V, junction temperature unspecified — expect it to rise with temperature, but SiC leakage stays an order of magnitude below silicon at the same voltage and temperature. Junction temperature range is -55 °C to 175 °C, which covers automotive under-hood, industrial motor-drive cabinets, and high-ambient telecom rectifiers without derating.
Through-hole TO-220 — heatsink and layout
Packaged in a standard TO-220-2 (Infineon code PG-TO220-2-1), this is a two-lead through-hole device with the tab as the cathode. The tab is electrically live at cathode potential — insulate or use a thermal pad if mounting to a grounded heatsink. The large tab area gives a low thermal resistance to the case, letting the 8 A rating hold up to high ambient if the heatsink is sized for the total dissipation. Input capacitance is 240 pF at 1 V reverse bias, 1 MHz — negligible for switching frequencies up to several hundred kHz, but worth noting for the gate-drive loop in a synchronous rectifier stage.