30 A, 200 V, 50 ns trr — the switching and blocking envelope
The STTH30R02DJF-TR: Rated for 30 A average rectified current (Io) and 200 V DC reverse voltage (Vr max), this diode handles the output stage of a 200 V bus PFC or secondary-side rectifier in a 150-200 W class power supply. The 50 ns reverse recovery time (trr) places it in the fast-recovery class (under 500 ns per the spec), which means it recovers quickly enough for continuous-conduction-mode boost converters running above 50 kHz — the switching loss stays manageable at those frequencies.
Forward drop and junction temperature — the thermal budget drivers
Forward voltage is 1.15 V max at 30 A, so at full rated current the conduction loss is about 34.5 W — that heat must be sunk through the PowerFlat package's exposed pad to keep the junction below the 175°C absolute maximum. The 175°C max junction temperature gives margin above the typical 150°C limit of standard ultrafast diodes, which matters when the ambient inside a sealed PSU enclosure pushes 85-90°C and the thermal resistance budget is tight.
PowerFlat 5x6 — compact footprint for high-current surface-mount
Housed in the 8-PowerVDFN package (PowerFlat 5x6), this diode's exposed pad on the bottom side must be soldered to a copper plane on the PCB — the board copper area and via array under the pad set the effective thermal resistance, not the package alone. Surface-mount assembly with a 5x6 mm footprint keeps the component height low, suiting it for 1U power supplies and adapter designs where through-hole TO-220 or TO-247 diodes would not fit.
RoHS3 compliance and sourcing posture
RoHS3 compliant — no regulatory restriction for EU, UKCA, or global BOMs that require exemption-free compliance.