Sounds like the resettable breakers did their job. You did not mention what make or year your 5th wheel is.
I have a 2016 33IK Silverback that has those exact breakers as Iím sure most do. Mine has tripped one time in 5 year. I donít see any reason to tear it apart and upgrade as it looks like the cause of them tripping was an overload of the motor. The wiring and breakers did not cause the overload, the malfunction of the level up system did.
Glad you found them...
2016 Siverback 33IK, Towed 40K+ miles
2018 Ford F-350 Lariat 6.7L V8 Diesel 4WD Crew Cab
Andersen Ultimate Hitch
RadMini Stepthru eBikes
"If you don't know where you are going, any road will get you there."