A quick Google of Schottky Diode and TO-220 yielded some sources.

I just tried the first one and then found this:

http://www.onsemi.com/PowerSolutions...do?id=MBR2515L

looks like even slightly better than what I had bought.

You'd lose about 0.3 volts during normal operation.

Datasheet at:

http://www.onsemi.com/pub/Collateral/MBR2515L-D.PDF

I'm sure some googling will find that someplace like DigiKey will have
these and will take small ordering quantities.

Is Paul Remde out there? Might be a nice "kit" to add to your line.
Kit includes 4 diodes, 4 heat sinks, 4 insulating washers some heat
shrink tubing, etc.??

Good luck.




Gary Emerson wrote:
Nyal Williams wrote:

I'd like to see a full write-up with diagrams, photos,
and names/addresses of places to buy parts. This would
make a good article for Soaring.


Here is a sketch

http://www.mydatabus.com/public/emer...y/e/sketch.JPG

and a pic of my install...

http://www.mydatabus.com/public/emer...y/e/diodes.jpg

There is a aluminum bracket which is lightly mounted to the bulkhead.
The PC board just provides insulation and some support for the wires.

Each diode has a heat sink, but I don't really think it was necessary.

I don't have the part numbers handy, but I'll see if I can't find
something.

With 18Amps of forward current capability (each), there isn't really any
"need" for the two diodes in parallel, but for an extra $5 and a few
extra minutes of wiring, if any one diode ever did fail "open" the other
would still provide power. Most likely overkill.