[raverbashing]

Because the heat is not on them. They're built for the nominal current of the circuit, so if you go beyond that, they'll be toast, but again, your circuit will fry first

Fuses are a different alloy as well http://en.wikipedia.org/wiki/Fuse_%28electrical%29#Construct...

[dghughes]

And partly maybe because resistance actually decreases in silicon as temperature increases.

[snogglethorpe]

Wow, people really went to town with that Fuse article! oO;