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Old 12th January 2010, 05:00 AM   #1
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Default crossfire amp

Im rebuilding the power supply in this amp. The big diode in it is marked mr851
Wondering if i can replace it with a 1n5407g or 1n5408?
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Old 12th January 2010, 06:59 AM   #2
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Location: Louisiana
It depends on the application. The 851 is a fast recovery diode and the others are not. If the application requires fast switching, the ones you listed may overheat and fail.

Where are they being used?

What model amp?
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Old 12th January 2010, 07:41 AM   #3
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Its the big diode behind the power and ground connections on the amp the modle is cfa302
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Old 12th January 2010, 07:46 AM   #4
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If the striped end is connected to B+ and the other end is connected to ground, your diodes will work.
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Old 12th January 2010, 07:49 AM   #5
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yes stripped is connected to b+ other end to ground
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