The STMicroelectronics STTH1302CT is a fast-recovery epitaxial diode in a dual common-cathode configuration, housed in a TO-220-3 through-hole package.
The 25 ns reverse recovery time is specified for this diode. The 1.1 V forward drop at 6.5 A and 175 °C max junction temperature are listed in the datasheet.
Lifecycle reality — obsolete, sourced to order
Package and mounting — TO-220 common cathode
The TO-220-3 through-hole package with a common-cathode pair means the two anodes are independent, and the tab is the shared cathode connection. That pinout is standard for half-bridge output rectifiers and dual-diode boost stages where the cathodes tie together to a common output rail. The through-hole body suits point-to-point wiring, terminal blocks, or PCB mounting with a drilled hole pattern — typical for power supplies, motor drives, and industrial converters where vibration resistance and thermal cycling matter.