QOU Miniature Molded Case Circuit Breakers are intended for use in residential and commercial applications. They are used for overcurrent protection and switching on both AC and DC electrical systems. These Breakers These Breakers provide a means to manually open a circuit.QOU breakers are able to operate up to 22 kA short ciruit current. . A range of accessories can be found for these breakers with their product range and are versatitle in their mounting.