I was going by a "polyswitch fundamentals" doc from a manufacturer[1] - and had the weasel-word "properly" :) Apparently the resistance falls quickly at first

I was going by a "polyswitch fundamentals" doc from a manufacturer[1] - and had the weasel-word "properly" :) Apparently the resistance falls quickly at first but can take a long time to fully return to pre-trip level. This has caused trouble in the Raspberry Pi. Users were getting odd effects when voltages didn't quite return to spec after polyfuse trip. [2] [1] http://www.te.com/content/dam/te-com/documents/circuit-protection/global/CPD-Catalog/S11_PolySwitch-Fundamentals.pdf http://www.te.com/content/dam/te-com/documents/circuit-prote... [2] http://elinux.org/Polyfuses_explained http://elinux.org/Polyfuses_explained