Re: paralleing bridge rectifiers

Jon Slaughter wrote:
Anyone see any issues with paralleling two or more bridge rectifiers to increase the total current capacity and reduce each components individual heat signature?

As replied, you can't rely on better than about 30% to 70% sharing, if connected directly together, and mounted on a common heat sink. If you can add a low resistance (one that will drop about a tenth of a volt at average rated current, which will drop more at instantaneous peak current) you can force the sharing to be much closer. You can put the resistor in either AC leg, but you need to put it in the same leg of both bridges. Now you have the temperatures of two more components to worry about. But there may be an up side, besides the sharing. They will tend to slightly lower the peak current in total, helping the transformer and capacitors reduce their RMS current for a given DC average output current. The other down side is the slightly lower output voltage (that should be less than a volt).
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