Eatons Type CHQ circuit breakers protect the wires in your home from overheating (referred to as an overload) and fault currents (referred to as short circuits). CHQ Breakers are classified replacement circuit breakers considered suitable, by underwriterâ€s laboratories, for use in another manufacturers load center. These breakers have been tested extensively in QO panels. This level of testing assures that the breakers meet identified standards and have been found suitable by UL for the specified purpose.