MBR4060PT dual schottky rectifier as bridge rect.

jscherer · 24th February 2009, 10:35 PM

I got a dozen or so of these for free and wanted to check that they would be a good choice to use two of them and form a bridge rectifier as part of a DC power supply.

http://www.fairchildsemi.com/ds/MB/MBR4060PT.pdf

60V max reverse & 40A average rectified forward current. Should be enough ;-)

woody · 24th February 2009, 11:58 PM

Can't answer that till you show us the circuite you intend to use them in transformer type, voltage ect.

jscherer · 25th February 2009, 12:53 AM

Of course, sorry about that. Its a capacitance multiplier supply that my son wants to use for a JLH 2005 Class-A amp.

http://www.tcaas.btinternet.co.uk/jlhcapmult.htm

Transformer is dual secondary 32-0-32 400VA
C1 & C2 in that schematic will be dual 10,000 uF 75VDC - 20,000 uF per rail.

woody · 25th February 2009, 01:45 AM

Don't think so. The problem is the 60v reverse breakdown rating.

Take a look at just the + cap. The 32 v ac will charge the cap
to about +42v during the half cycle it's charging but on the other
half cycle the diode will see 42v+ from the cap and - 42v from
the transformer for about 84v across it this excedes the 60v rating.

jscherer · 25th February 2009, 04:21 AM

Thanks Woody,

I'll pick up some MBR20200CT's I think

Thanks

24th February 2009, 10:35 PM	#1
jscherer diyAudio Member Join Date: Apr 2008	MBR4060PT dual schottky rectifier as bridge rect. I got a dozen or so of these for free and wanted to check that they would be a good choice to use two of them and form a bridge rectifier as part of a DC power supply. http://www.fairchildsemi.com/ds/MB/MBR4060PT.pdf 60V max reverse & 40A average rectified forward current. Should be enough ;-)

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24th February 2009, 11:58 PM	#2
woody diyAudio Member Join Date: Jan 2002 Location: Tyrone Ga. U.S.A.	Can't answer that till you show us the circuite you intend to use them in transformer type, voltage ect.

25th February 2009, 12:53 AM	#3
jscherer diyAudio Member Join Date: Apr 2008	Of course, sorry about that. Its a capacitance multiplier supply that my son wants to use for a JLH 2005 Class-A amp. http://www.tcaas.btinternet.co.uk/jlhcapmult.htm Transformer is dual secondary 32-0-32 400VA C1 & C2 in that schematic will be dual 10,000 uF 75VDC - 20,000 uF per rail.

25th February 2009, 01:45 AM	#4
woody diyAudio Member Join Date: Jan 2002 Location: Tyrone Ga. U.S.A.	Don't think so. The problem is the 60v reverse breakdown rating. Take a look at just the + cap. The 32 v ac will charge the cap to about +42v during the half cycle it's charging but on the other half cycle the diode will see 42v+ from the cap and - 42v from the transformer for about 84v across it this excedes the 60v rating.

25th February 2009, 04:21 AM	#5
jscherer diyAudio Member Join Date: Apr 2008	Thanks Woody, I'll pick up some MBR20200CT's I think Thanks