Dual Schottky for power rectification and OR-ing
The STPS10L40CG-TR is a dual Schottky rectifier from STMicroelectronics, with two 5 A diodes in a common-cathode configuration inside a single D2PAK (TO-263) surface-mount package.
What the fast recovery rating means for the switching loop
This part carries a speed classification of Fast Recovery ≤ 500 ns at > 200 mA.
Thermal and package reality for the layout
The D2PAK (TO-263-3) has a large exposed tab on the bottom — the common-cathode output. With a 150 °C maximum junction temperature and 5 A per diode, the copper area and airflow set the real-world current derating. The two diodes share the same tab, so the total power dissipation is the sum of both channels.