20 A, 200 V fast recovery diode in D2PAK
The STTH2002G-TR is a 20 A average rectified, 200 V reverse voltage fast recovery diode from STMicroelectronics, housed in a D2PAK (TO-263AB) surface-mount package. Its 40 ns reverse recovery time (trr) suits it for high-frequency switching power supplies and freewheeling circuits where recovery losses matter.
Switching speed and conduction losses
The 40 ns trr places this diode in the fast-recovery class (≤500 ns, >200 mA), making it a candidate for boost converters, PFC stages, and output rectification in switch-mode power supplies where stored charge recovery time directly affects efficiency and EMI. Forward voltage drop is 1.1 V maximum at 20 A, giving a conduction loss of roughly 22 W at full rated current — the D2PAK's exposed pad on the PCB must be thermally managed with adequate copper area and vias to keep junction temperature under the 175 °C maximum. Reverse leakage is 10 µA at 200 V, which is negligible for most power circuits but rises with junction temperature — budget for this in high-temperature designs near the 175 °C limit.
Package and mounting for PCB integration
The D2PAK (TO-263AB) is a surface-mount package with a large exposed metal tab on the bottom — the tab is the cathode connection and the primary heat path. The PCB footprint should match the tab area with thermal vias to inner or bottom copper planes for effective heat sinking. Supplied in Tape & Reel (TR) or Cut Tape (CT) options, the STTH2002G-TR is compatible with standard pick-and-place assembly for medium to high-volume production.
Sourcing and availability
For a higher-current variant, the STTH3002G-TR (30 A, 200 V, 50 ns trr) shares the same D2PAK footprint and pinout — a drop-in replacement if your thermal budget allows the extra 10 A.