Thermo fuse 20A and 30A ???

Hello together.
I've got a couple of questions about thermal protection.
According to ETOS, there are two different:

443 937 105 with 20 Ampere Relaiplatz 12
443 937 105 A with 30 Ampere Relaiplatz 14

Got both in my slots with 20 A.

Is that right, or is it one each with 20 and 30 A?
Or is that dependent on the equipment so that both of me have to be installed with 20 A?

And are these thermal fuses responsible for shutting down the windows?
If not, what's the signal for the window lifters to shut down?

Thank you so much.
Greetings Daniel M.