220vac 1P breaker on 110vac Circuit

[TAS2]

Hey. I am working on a project and planning to incorporate power and electronics using DIN rail. I ordered some 1P breakers and then later noticed they’re marked 220vac. I’m in North America and everything except certain equipment run on 110vac.

Will using the 220vac breakers on 110vac work properly?

[f4eru]

Yes, absolutely they will work no problem, but one thing to keep in mind:
Those breakers are not certified/approved for your country, so don't count on them as far as anything involving legal issues are concerned (insurance, responsibility, etc....)
As long as your supply has a properly approved breaker upstream protecting the whole circuit you should be fine.

[NiHaoMike]

If they have active protection features like GFCI/RCD or AFCI, those features probably won't work reliably if at all. But the overcurrent part will work just fine.