Can you figure out a way to make solder traces ? Might be lower  still.

RP

On 23/01/06, Peter Todd <pete@petertodd.ca> wrote:
> On Sun, Jan 22, 2006 at 11:58:32AM -0500, Spehro Pefhany wrote:
> > >If you blast enough current thru them, like discharging a large cap, they
> > >pretty much have to fail open I would think.  I admit I haven't tried this.
> > >Hmm, I do have a roll of 0603 LEDs around here somewhere...
> >
> > The bonding wire will probably act as the fuse, but being embedded in epoxy
> > it will take more energy to fuse than if the wire was hanging in mid-air.
> >
> > Here's a chart of fusing currents for various types of wire:
> >
> > http://www.speff.com/fusing.htm
>
> Thanks!
>
> Geezus, that's really scary, 5.12 amps for a 6mil dia wire...
>
> The chart looks accurate to me though. I've got some #32 stainless steel
> wire for another project. According to your chart, iron fails at 2.21
> amps. In my experience, SS is about 2.5A Not the exact same material of
> course, but that's close.
>
> I wonder if it's possible to get circuit boards that have *just* tin as
> the conductive layer? Tin's fusing current is one-fifth that of copper.
>
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