SiC Schottky — zero-recovery switching
The STPSC10H065DY is a 650 V, 10 A average silicon-carbide Schottky diode in a TO-220AC package. Its SiC Schottky barrier delivers zero reverse recovery charge — the diode turns off with no stored minority carriers, so switching losses stay flat across temperature and load. This makes it a strong fit for continuous-conduction-mode PFC stages, boost converters, and output rectification in on-board chargers and DC-DC converters where the 650 V rating covers a 400 V bus with margin. Automotive AEC-Q101 qualification (Grade 0 implied by the -40 to 175 °C junction range) means the part has passed the reliability screening for under-hood and transmission-mounted electronics — thermal cycling, high-temperature reverse bias, and humidity testing per the automotive stress standards.
Conduction and thermal budget
Forward voltage is 1.75 V maximum at 10 A and 25 °C junction. At full rated current that is 17.5 W conduction loss — the TO-220 tab needs a heatsink sized for the junction-to-case thermal resistance, especially in a 175 °C ambient environment. The 480 pF capacitance at 0 V, 1 MHz keeps the switching node capacitance low enough for MHz-range operation without excessive ringing on the gate-drive loop. Reverse leakage is 100 µA at 650 V rated reverse voltage. SiC leakage rises with temperature but stays orders of magnitude below silicon fast-recovery diodes at the same junction temperature, so the diode does not thermally run away in high-temperature idle conditions.
Obsolete — sourcing through independent channels
STMicroelectronics has marked the STPSC10H065DY as obsolete. No official successor part number is published. For a BOM that already uses this diode, the closest functional peer is the STPSC10C065RY, which shares the same 650 V / 10 A SiC Schottky die in the same TO-220AC package but carries a 'No Recovery Time' speed classification instead of the 'Fast Recovery' label. It drops into the same footprint without a board spin.
Rework and board-fit note
TO-220 through-hole — two leads and a tab. The tab is the cathode; the anode is the left lead when the package is viewed with the tab to the rear. Standard 1.0 mm drill holes and a copper pad under the tab for thermal relief. The part survives hot-air rework without issue — the SiC die is mechanically robust, and the lead frame takes solder-wick and iron heat without pad lift. Just pre-tin the tab pad and let the solder flow through the hole.