John Curl advocates this one: re-settable fuses
They are starting now becoming industry standard as their prices have come down over the last year or so, they are now much cheaper than a good $2 fuse + the fuse holder, and that is a big fact to manufacturers.
But there’s no voodoo inside them if you care to investigate.
http://uk.farnell.com/pptc-resettable-fuses?searchRef=SearchLookAhead
Cheers George