STMicroelectronics STTH803G-TR, Standard Fast Recovery Diode, 300 V, 8 A, 35 ns trr, 1.25 Vf @ 8 A, Surface Mount D2PAK (TO-263), 175 °C Tj max, Tape & Reel.
| Parameter | Value |
|---|---|
| Diode type | Standard |
| Mounting | Surface Mount |
| Voltage - DC reverse (Vr) | 300 V |
| Voltage - forward (Vf) (Max) @ if | 1.25 V @ 8 A |
| Current - reverse leakage @ vr | 20 µA @ 300 V |
| Current - average rectified | 8A |
| Operating temperature - junction | 175°C(Max) |
| Speed | Fast Recovery =< 500ns, > 200mA (Io) |
| Package | Tape & Reel (TR); Cut Tape (CT) |
| Case | TO-263-3, D²Pak (2 Leads + Tab), TO-263AB |
| Reverse recovery time | 35 ns |
The D2PAK (TO-263) is a surface-mount power package. For 8 A continuous, a minimum of 2–3 square inches of 2 oz copper on the drain tab is typical to keep the junction below 175 °C.
No end-of-life notice is on record, and no last-time-buy window is open. For a BOM freeze, this part does not carry a PCN risk from obsolescence in the near term.
The base product number STTH803 covers the same die in different package and packing options. The STTH803G-TR is the D2PAK variant on Tape & Reel. A direct functional equivalent would be another 300 V, 8 A fast-recovery diode in D2PAK with a 35 ns trr, such as parts from the same ST family or competitors like ON Semiconductor's MUR series, but pin-for-pin compatibility depends on the specific package outline — D2PAK is standardised, so most D2PAK diodes share the same footprint.
Typical applications include boost diodes in power-factor-correction stages, output rectification in flyback and forward converters, and freewheeling diodes in motor-drive inverter legs — any circuit where 300 V blocking and 35 ns recovery are needed at 8 A average current.
Yes, the 35 ns trr keeps switching losses low enough for 50–100 kHz PFC and DC-DC stages. The 1.25 V forward drop at 8 A is typical for a fast-recovery diode in this voltage class; for higher efficiency at light loads, a silicon-carbide Schottky diode would offer lower Vf and zero recovery charge, but at a higher cost.
Yes, the STTH803G-TR is RoHS3 compliant.