The STMicroelectronics BYW80-200 is a fast recovery rectifier diode rated for 200 V reverse voltage and 10 A average forward current, with a reverse recovery time of 35 ns. It is housed in a through-hole TO-220-2 (TO-220AC) package, intended for high-frequency rectification and freewheeling diode applications in switch-mode power supplies, motor drives, and power conversion stages where switching losses matter. The 35 ns trr places it in the fast-recovery class, suitable for circuits operating above line frequency where a standard recovery diode would cause excessive reverse-recovery losses.
The 35 ns trr is the headline switching parameter. In a continuous-conduction-mode boost or flyback converter, that recovery time directly sets the turn-off energy in the diode and the peak reverse current that the companion MOSFET must commutate. A 35 ns diode keeps the reverse-recovery charge low enough to avoid excessive ringing or thermal stress in a 50–100 kHz switching stage, but it is not an ultrafast class (sub-20 ns) — budget a snubber if the layout has more than 10 nH of stray inductance in the loop.
10 A, 200 V — the power handling envelope
The 10 A average rectified current and 200 V reverse voltage define the safe operating area. At 15 A forward current the forward voltage drop is 1.15 V max, so conduction losses at 10 A average are roughly 11.5 W — the TO-220AC package with a heatsink is mandatory for any continuous load above a few amps. The 10 µA leakage at 200 V is a room-temperature figure; expect leakage to double every 10 °C above 25 °C junction, so derate the reverse voltage if the junction runs near the 150 °C maximum.
The BYW80-200 carries an Obsolete lifecycle status from STMicroelectronics. The BYW80-200 is not in active factory production, so any procurement should verify stock position before committing the BOM line.