Fast recovery diode for PFC and high-frequency rectification
It comes in a TO-220-2 through-hole package (TO-220AC). This class of diode is used in power factor correction (PFC) boost stages, output rectification in switching power supplies, and freewheeling diodes in motor drives where fast switching reduces losses and EMI.
The 35 ns reverse recovery time is the key parameter that distinguishes this part from a standard 50/60 Hz rectifier. In a continuous-conduction-mode PFC boost stage operating at 100 kHz, a 35 ns trr means the diode snaps off quickly when the MOSFET turns on, minimising the reverse-recovery charge that the FET has to absorb. That directly reduces switching loss and ringing on the drain node. If the trr were much slower — say 200 ns — the same circuit would need a higher-current MOSFET or a snubber to survive the turn-on spike.
There is no official ST successor listed for this part, so a cross-reference search is the next step if you need a production-grade alternative.
Sourcing the BYW29-200 today
Because this part is obsolete, it is not stocked by the manufacturer. We source it through our independent distribution network — we locate available inventory, verify authenticity, and quote it to you against an RFQ. If you need a production-ready alternative, we can also help identify a suitable cross-reference.