A 30 amp GFCI breaker fits your panel only when its brand and series appear on the panel’s approved breaker list, not by amperage alone.
For the full breakdown, see our best 30 Amp GFCI Breaker guide.
A 30 amp GFCI breaker that latches into one panel will not seat in another, and nothing printed on the handle warns you. The brand and series stamped on the breaker case must match a name your panel’s label already lists — buy the wrong family and the part is dead weight at any price.
Sorting out how to choose the right 30 amp GFCI breaker for your panel takes one trip to the panel door and one label read. Everything below follows from