Product review (5 stars): easy fix for the campers fridge...
I believe my Norcold refrigerator is the N611.  It takes a 300 watt heating element and was burned out so I ordered this one.  Basically if your fridge is popping your gfci in your camper, then you have a bad heating element.  I unplugged the element and ran it off of propane, which it barely used for several days.  ordered this when i got back from my trip and pulled the old one out while the heater flu was still hot from the propane running for days and expanding the metal, took 2 mins to pull.  If its cold, it could be very hard to pull, just shimmy-ed it back and forth and up to remove.  the old one slipped in with some back and forth shimmy-ing, plugged the wires back into the board and put the cover back on and plugged it in and its working!