... might know of a modern (or more importantly available) equivalent? I can't find one in my books. It's a 3.5A controlled avalanche rectifier diode, the 'controlled avalanche' bit is quite important as they are from a switcher PSU.
Jim
Well, equally important is the voltage it's supposed to clamp. The only one that comes to mind is an NTE570 which is used for 130 vdc. It's designed to crater at 180 volts. If you know the voltage, you could use a zener diode to achieve the same results if you can find one with that current rating.
The data sheet indicates trr=3uS for the now discontinued BYM56E which makes it a standard recovery type (ie. not fast or super-fast), so there are a few possible types I would try.
I assume the PSU is an off-line 230Vac SMPS for use in the UK?
I doubt that the 3.5A Ifav rating is strictly needed and you could get by with one specified at 3A such as the BYW86 (probably not readily available)
Also, I don't think the 1000V rating is strictly necessary for a
230Vac input and you could get by safely with 800V types. The old venerable 1N5627 has been used successfully in off-line switchers and would be readily available.On Sat, 08 Jul 2006 13:18:50 +0100, Jim Attfield put finger to keyboard and composed:
BYW96E is a 1000V 3A 300ns controlled avalanche diode. It is available for AU$0.89 in Australia.
- Franc Zabkar
-- Please remove one 'i' from my address when replying by email.
--- snip! ---
... to all those kind souls who took the time to respond. That has given me some options.
Jim
ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.