Digikey
In stock
$$.92/1

0.0005 Ohms
10 W
5 x overload for 5 seconds =3D 50 Watts.

I =3D sqrt(P/r) =3D sqrt(50/.0005) =3D ~170A for 5 seconds.

At say 100 A V =3D 50 mV

0.0002 Ohm versions available

0.5 milliOhm
$ http://www.digikey.com/product-detail/en/WSLP5931L5000FEB/WSLPD-.0005CT-N=
D/2695498
Data  http://www.vishay.com/docs/30176/wslp3921.pdf
Vishay

Interesting shape.

   6030 pkg

~=3D 15mm x 8mm

Tc  150 ppm/C
ie 1.5% at 100C

Didn't note C/W mentioned but may have to bind to significant blocks
of copper to keep 'cool enough'.

______

Nichrome strip

Andy metals
China
Seem to have what you want
7mm strip looks good.
0.3 milliOhm/cm :-)

They MAY be able to advise US/Canadian agents

http://www.andymetals.com/windows/b1.sb1.1.htm

______________

Buy 1 kW 110V NiCr toaster element,
Unwind tape.
Double 10 times :-).*
Clamp between  Cu blocks

* About 6 doublings about the limit - maybe 7.




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