The STTH20L03CG-TR is a 300 V, 10 A per diode fast recovery rectifier from STMicroelectronics, housed in a TO-263-3 D²Pak surface-mount package. The headline switching parameter is a 26 ns reverse recovery time — this places it in the ultrafast recovery class, suited for continuous-conduction-mode boost stages, flyback snubbers, and PFC circuits where reverse-recovery losses dominate the switching loss budget.
STMicroelectronics lists the STTH20L03CG-TR as Obsolete. Sourcing this part means going through independent distribution and surplus channels. Availability is limited to existing stock lots; each RFQ is quoted against what is physically on hand. No last-time-buy window exists — the part is already past that stage.
Package and footprint — TO-263 D²Pak surface-mount
The tab is electrically common with the cathode of both diodes. The 2-lead-plus-tab configuration is standard for this footprint.