“Unidirectional breakers” aren’t a thing for AC circuits.

jonatron 2 hours ago | parent | next [-]

	▲	formerly_proven 37 minutes ago \| parent [-]
		It would be really interesting to know what's so special about these UK units that they can be "damaged" by being fed from the "wrong" side (as per some other article), considering that the only place where these behave like that is an island north of France.

Not in the US, but in parts of Europe they effectively use AFCI/GFCI breakers for everything.