55 ns trr — the switching-speed anchor
Its 55 ns reverse recovery time places it in the fast-recovery class for hard-switched converters.
10 A per diode, common-cathode pair
Two 10 A diodes share a common cathode in one D2PAK — a layout-efficient fit for center-tapped secondary rectifiers and interleaved PFC stages. Reverse leakage is 8 µA at 600 V, which is typical for a 600 V fast-recovery die and not a dominant loss term below 125°C junction.
Obsolete — sourcing through the spot channel
ST lists the STTH16L06CG as obsolete. Availability is limited to surplus and broker inventory — date codes vary, and counterfeit screening is standard practice before the parts hit the BOM.