I was thinking; If a relay is used to power a circuit AND itself, if the circuit is shorted - the relay should lose its own power and turn off - almost like a resettable fuse.
To power it up, I would have to bypass the relay temporarily.
Is this a valid use case? I was actually planning to use it as a "suicide switch" for my robot, but it seems this is an additional benefit?
PS: I'll keep my main fuse as well.