> I'm actually interested in things done to get more heat out of 1N400x 
> diodes.

What I often see in SMPSes is a diode that is vertical to the PCB, with
the high side connected to an L-shaped slab of metal (other side of this
slab is connected to the PCB). Heatsinking with the top wire as heat
conductor. I think the housing itself is not designed to conduct heat
very well, so the wire might be the best way out for the heat. Probably
one wire is better than the other.

Wouter van Ooijen

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