Is this a diode? Please see pics, identifier is RU4Y above a second line saying 1N, but I cannot identify. Can I use for a 1N5408? Thanks.
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Is this a diode?
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Re: Is this a diode?
Standard recovery 1N540x would probably get toasted if a fast recovery type is necessary.
On the other hand, a UF5402 is much faster than the original part, and might generate extra noise with its fast turn-on.
A closer match would be an MR852. The MR850 series has been around a long time. As the part number suggests it was originally a Motorola part, among the many Mot sold to On Semi. I remember seeing MR85x parts in use as Boschert when I was there in the early 1980s.PeteS in CA
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