For sure stelios, this is given. But the hybrids i talked about have something to do with temperature detection without the use of PCB protection. So they are unprotected in the usual sense but protected by some technology they use. I am no expert.
I study electrιnics (intermediate level) 30 years ago and Ι must be a little uninformed so I don't know if and how much effective is this temperature detection circuit.

