I have a hot tub served by an outside panel with a 220 volt gfi breaker and a 120 v 20 amp gfi breaker. The 20 amp breaker has tripped a couple of times and I've noticed that the TEST function button on it no longer works. I'd like to replace that breaker, A GE THQL1120GF breaker. Although I have found a few places that sells that breaker in new condition it seems it has been discontinued by GE. I also see that I could get a GE THQL1120GFTP from ACE hardware or Menards (a Wisconsin big box building material store) or a GE THQL1120GFT from several online sources.
Can I substitute the THQL1120GFTP or the THQL1120GFT for the THQL1120GF? are they electrically and mechanically equivalent? Which might be the better replacement?
Or is there some other brand breaker (Siemans) that's equivalent to the THQL1120GF?