The STPR1020CB-TR is a fast-recovery diode from STMicroelectronics, configured as a common-cathode pair in a single DPAK package. The headline spec is the 30 ns reverse recovery time, which puts this part in the fast-recovery class suitable for continuous-conduction-mode PFC boost stages, flyback snubbers, and output rectification in medium-frequency SMPS designs. The 990 mV forward voltage at 5 A is a typical conduction-loss anchor for thermal budgeting at full load.
DPAK package — reflow and footprint notes
The part comes in the DPAK (TO-252) surface-mount package, a standard footprint for medium-power diodes. The single exposed tab on the DPAK carries the common cathode connection and is the primary thermal path. For the pick-and-place line, the DPAK is a stable, low-tombstoning-risk package. The Tape & Reel delivery suits automated assembly.