might want to change your ideas.
From a Cutler-Hammer brochure
[FONT=Univers-Light][size=1][size=2]Cutler-Hammer Type CH breakers
also carry a lifetime warranty –
the best in the industry.
For Square D
Square D/Schneider Electric Residential Products Limited Warranty
I. Square D/Schneider Electric QO® brand Load Centers and Load Center Branch Circuit Breakers
Square D/Schneider Electric warrants its branch circuit breakers to be free from defects in material and workmanship under normal care and proper usage in a residential installation, for the lifetime of the load center in which it is installed. QO® brand load centers are also covered under the same lifetime warranty. If the circuit breaker or QO brand load center fails within the warranty period because of a defect in material or workmanship, Square D/Schneider Electric will replace the defective breaker free of charge upon following the notice procedures below and return of the product to place