30 ns reverse recovery — what it buys you
The STTH2R02A is a 200 V, 2 A standard fast-recovery diode from STMicroelectronics, with a 30 ns reverse recovery time. That trr puts it in the class of ultrafast diodes suited for switching power supplies, PFC boost stages, and flyback clamp circuits where recovery charge directly impacts efficiency and ringing.
Rated for a maximum junction temperature of 175 °C, this diode handles the thermal stress of continuous 2 A forward current in a compact SMA package.
Housed in a DO-214AC (SMA) surface-mount package, the STTH2R02A is a straightforward hand-rework target. The cathode tab is the large end of the body — orientation is unambiguous. Standard hot-air profile at 260 °C peak is fine; the 175 °C Tj rating gives margin against thermal shock during reflow. No moisture sensitivity level is listed, but SMA diodes typically handle MSL 1 without a bake.
It is ROHS3 compliant, with no lead or restricted substances in the termination finish. For new designs or BOM fill, this part is a low-risk selection from a lifecycle standpoint.