I've a wealth of A.C. landscape XFMR. How do you size the small full wave rectifiers for use in running LED's off these?

I'm using 12volt 50 watt thru 150 watt AC xfmrs and need to know how to size corresponding full wave rectifiers as available all over the web for anywhere from $3.00 to $10.00. Any help would be greatly appreciated. These are the typical A.C. landscape xfmr's I want to adapt to DC output. I'd like to avoid heat sinking at all costs.

Thanks,
Zappenfusen 

Comments

[steveastrouk]

50 W at 12 V ~4A, 150 W~12A. There's not a LOT of difference in price- and you can buy enough 12A ones to cover ALL your stock.

Voltage rating isn't important obviously, and you don't see rectifers less than about 50V anyway.

Steve