33 ns reverse recovery — the hard-switching limit
The VS-E5TX1506-M3 is a Vishay FRED Pt® standard recovery diode rated 600 V reverse and 15 A average forward current, in a TO-220AC through-hole package. Its 33 ns reverse recovery time (trr) places it in the fast-recovery class.
175 °C junction — thermal budget for confined spaces
With an operating junction temperature range from -55 °C to 175 °C, this diode carries the headroom needed for power supplies and drives that run in sealed enclosures or near hot heatsinks. The 175 °C ceiling means the 15 A forward rating can be sustained at elevated ambient without derating to a lower current tier, as long as the heatsink keeps the case temperature within the datasheet limits.
Leakage at 600 V — the off-state margin
Reverse leakage is specified at 10 µA at the full 600 V blocking voltage. That is a clean off-state for a 15 A device — no excessive standing loss in the PFC or boost diode position, and no risk of thermal runaway from leakage doubling at high junction temperature.