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Old 17th May 2015, 12:06 PM   #1
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Default Bridge rectifiers for audio

I was looking for some 35A bridge rectifiers and found the regular metal cased units and the one's we now get for switching power supplies in an in line package. The one I looked at was a D35XB-80 versus the metal encased KBPC3510 .

Is the inline type D35XB suitable for the supply ? I've seen many commercial offerings using the inline rectifiers , both in class AB and class D amps.
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Old 17th May 2015, 12:19 PM   #2
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For audio use you should use some high speed recitifiers like RURG 3060, 30A, 600V, 55ns.
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Old 17th May 2015, 12:32 PM   #3
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I use the KBPC as illustrated above, never had any issues with them in high end amplifiers.

The filtering is far more important than the rectifiers themselves.
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Old 17th May 2015, 02:07 PM   #4
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Quote:
Originally Posted by ashok View Post
Is the inline type D35XB suitable for the supply ?
Yep, provided the KBU type is mounted as the KBPC.
Look at a datasheet of the older pcb mounted in-line type, Rjc down by 2/3d.

(the 35A rating is pretty meaningless without an Rjc number, imo. Rjc for KBPC35** types can be 2-2.5 times the value of a current through-hole KBU model)
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Old 17th May 2015, 03:10 PM   #5
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Quote:
Originally Posted by Keruskerfuerst View Post
For audio use you should use some high speed recitifiers like RURG 3060, 30A, 600V, 55ns.
Fast parts like these have high forward voltage drop. They can generate worse switching noise if you are not careful, due to the fast switch off.
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