dual center tap rectifier replacement

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Hi,
Rapid show three dual diodes in their catalogue, 2*15A, 2*14A, 2*30A all made by ST.
I think they are all fast for switch mode, the 15 & 30 are described as ultrafast , soft & noise-free recovery.

I suspect RS & Farnell will have similar.

I use www.rapidonline.com a lot. They are cheap (in UK) fast, free post on orders over £25.

I see the online has no 30A version.
 
thank you for the help andrew,what im finding difficult to find is a pair of soft recovery low trr dual center tapped rectifiers one with a common cathode and the other with a common anode in the 247 case no less than 10a per leg no less than 100v any other reccomendations?
 
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