I had the same 'thermal limiter' (Siemens part no. 00152792, Z430KK6E E065FF1 UK T180). This fuse could very well been produced in or for The Netherlands (I'm also Dutch), as in the metal part of it is puched "KEMA KEUR" which is the Dutch authority on certificates for electrical safety.
Under normal operation it's open. When overheated, it's shorted and will switch on the fans.
So it is indeed a "crow bar".
Never seen one like this before, I was always used to have continuity if the fase is ok, but this one is the other way around apparently.

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