The STTH310 is a 1000 V, 3 A ultrafast rectifier from STMicroelectronics in a DO-201AD axial through-hole package. Its 75 ns reverse recovery time places it in the ultrafast class, making it a fit for continuous-current-mode (CCM) power factor correction boost stages, flyback snubbers, and output rectification in switching power supplies where recovery losses directly affect efficiency and thermal budget.
Through-hole DO-201AD — board-level fit and thermal path
The DO-201AD axial package is a through-hole form factor with a 9.5 mm body length and 1.3 mm lead diameter. It is intended for leaded insertion into plated through-holes on a PCB or point-to-point wiring on a terminal block.
Junction temperature range and deployment environment
The 175°C maximum junction allows headroom for derating when the diode is mounted near transformers or heatsinks that push local ambient above 85°C.