600 V, 3 A Fast Recovery Diode in SMC Package
The STTH3L06S is a 600 V, 3 A fast recovery diode from STMicroelectronics, part of the STTH3 series. It is designed for hard-switching power conversion circuits where reverse recovery time directly impacts switching losses. With a reverse recovery time of 85 ns, this diode suits continuous-conduction-mode (CCM) boost PFC, flyback snubbers, and secondary-side rectification in offline power supplies switching up to about 100 kHz — the 85 ns trr keeps the reverse-recovery charge low enough that the MOSFET or IGBT turn-on loss stays manageable. The 1.3 V forward drop at 3 A (rated current) sets the conduction loss floor: at full load the diode dissipates roughly 3.9 W, which the DO-214AB (SMC) package must sink to the PCB copper. The 175°C maximum junction temperature gives headroom for compact layouts with limited copper area.
Active Lifecycle and Sourcing Reality
Sourced through independent distribution, the part is quoted to order against the BOM quantity. Availability and current pricing are confirmed at the time of RFQ — no stock-holding claim, but the active status means the factory pipeline is open.
Package and Footprint Fit
The DO-214AB (SMC) package is a standard surface-mount footprint for 3 A rectifiers. The cathode is marked on the body; the large tab on the anode side carries the current. Reflow profile per JEDEC J-STD-020, MSL level is typically 1 (moisture sensitivity level per ST's standard SMC parts). The 3 µA reverse leakage at 600 V rated reverse voltage is low enough for high-efficiency standby circuits — the leakage current at 125°C junction will be higher (roughly 10× per datasheet typical curves), so budget the thermal rise in the leakage power calculation.