ScuzzBlog: Diaries June 2017
Entry 25th June 2017: Post: 4
Fascinating
Quote .....
A Resettable Fuse is a polymeric positive temperature coefficient (PPTC)
device that is a passive electronic component used to protect against
overcurrent faults in electronic circuits. The device is also known as a
polyfuse or polyswitch. They are similar in function to PTC thermistors
in certain situations but operate on mechanical changes instead of
charge carrier effects in semiconductors. These devices were first
discovered and described by Gerald Pearson at Bell Labs in 1939 and
described in US patent #2,258,958
https://en.wikipedia.org/wiki/Resettable_fuse
And this is the fascinating part ..
*It could take hours, days, weeks or even years for the device to return
to a resistance value similar to its original value, if at all**
*
https://www.youtube.com/watch?v=LEudTOJQ8xo
scuzz
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