What this SiC Schottky brings to a power stage
The STPSC12065G-TR is a 650 V, 12 A silicon-carbide Schottky diode from STMicroelectronics, housed in a D²Pak (TO-263-3) surface-mount package. Its zero reverse recovery time (trr = 0 ns) eliminates the recovery tail that plagues silicon ultrafast diodes, cutting switching losses in hard-switched topologies like PFC boost stages, LLC converters, and inverter legs.
That means the MOSFET or IGBT in the same leg sees no reverse-recovery current spike, so you can run higher switching frequencies (100 kHz and up) without the efficiency hit or EMI spike that a silicon diode would add. The 750 pF capacitance at 0 V is low enough that the capacitive switching loss stays manageable even at 200 kHz.
650 V / 12 A — sizing for the rail
The 650 V reverse voltage gives comfortable margin on a 400 V DC bus (typical of power-factor-corrected offline supplies). The 12 A average forward rating supports a 1.5 kW PFC stage or a 48 V output rectifier at several hundred watts. Forward voltage is 1.45 V at 12 A, which is typical for a SiC Schottky of this die size — the conduction loss is predictable and the thermal design is straightforward with the D²Pak tab soldered to a copper pour.
Package and mounting — D²Pak thermal path
The D²Pak (TO-263-3) is a standard high-power SMD footprint. The 175 °C junction rating means the tab can run hot (125 °C or more) as long as the board copper and any forced air keep the junction below the limit. The part is ECOPACK®2 compliant, so it meets RoHS requirements without halogens or antimony trioxide.
STMicroelectronics lists the STPSC12065G-TR as Active.