Guess that Part! (mystery part #2 is up)

Originally Posted by logansryche

a self-resetting circuit breaker? I don't think so, but yeah - it's base is magnetic like fridge magnet. Mechanic's answer was closest to what the thing looks like.

I think you'll find that after electric flows thru it long enough then it probably magnetizes.

Ferrite is what speaker magnets are made out of. You can take a piece of ferrite and wrap a certain length of copper wire around it and hook to a battery and you've got an electrical magnet.