What this SiC Schottky actually does
That eliminates the switching losses and ringing you get with a fast-recovery silicon diode, which makes this part a direct fit for power factor correction (PFC) stages, high-frequency switching power supplies, and flyback or boost converters where efficiency and thermal management are tight.
The IDH03SG60C's trr is 0 ns.
Through-hole TO-220-2 (Infineon designates it PG-TO220-2-2). Two leads — anode and cathode — plus the metal tab is the cathode.
Infineon lists the IDH03SG60C as Active.