80 A, 600 V, 75 ns — what this diode brings to the power stage
The STTH80S06W is a fast-recovery epitaxial diode from STMicroelectronics, rated for 80 A average rectified current and 600 V reverse voltage. The 2.2 V forward drop at 20 A is a typical fast-recovery trade-off — you get the speed but pay a higher Vf than an ultrafast or Schottky alternative.
Obsolete — the sourcing reality for this line item
STMicroelectronics lists the STTH80S06W as Obsolete.
175°C junction — thermal margin for high-ambient environments
This matters for a 80 A part: at full rated current, the junction will run hot even with a good heatsink, and the 175°C ceiling gives headroom for derating in a 60°C to 85°C ambient inside a motor drive or solar inverter enclosure. The 50 µA reverse leakage at 600 V is a typical value at 25°C; expect it to rise with temperature, so the leakage power contribution should be factored into the thermal model at high junction temperatures.