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Can I swap the IN5408 with BY255 diodes in power stage of my tube amp?
Wiki User
∙ 12y ago
The 1N5408 is rated 3 amperes forward current and 1000 volt reverse voltage, with a 200 ampere peak surge current rating. The BY255 is rated 3 amperes forward current and 1300 volt reverse voltage, with a 100 amperes peak surge current rating.
The two diodes are comparable, but the 1N5408 has a higher transient rating.
Since it does not seem that you are talking about a power supply application, you can probably substitute the BY255 for a 1N5408. It depends on the circuit design, but most circuits (if properly designed) are over-rated so, again, it would probably work.
I would not use the BY255 in the power supply, however, due to the short term transient that comes from turning on the power. Again, circuit design prevails, and it might work even there, because inrush current will be limited by the inductance of the transformer and the dynamic resistance of the diode.
Wiki User
∙ 12y ago
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