Square D QO Miniature Circuit Breakers are plug-on products for use in QO load centers
QO Arc-fault Circuit Breakers provide protection for series and parallel type arcing QOB Bolt-on circuit breakers with visi-Trip indicator QO-GFI provide overload and short circuit protection combined with class A ground fault protection QO-EPD/EPE provide overload and short circuit protection combined with a class B ground fault protection QO-SWN Switch neutral common trip QO-HID are for use on circuits feeding fluorescent and high intensity discharge lighting systems QO-K are key operated circuit breakers available in single pole construction QO-HM High magnetic circuit breakers are recommended for applications where high initial inrush may occur
Square D
For use with Qwikline I consumer units and can be retrofitted in to existing systems,Type B characteristic offers instantaneous short circuit response level of 3-5 x normal rated current, making it suitable for circuits with moderate inrush currents such as filament lamps, heating loads and most domestic/small building protection applications.,Type C characteristic offers short circuit response of 5-10 x normal rated current, making it ideal for circuits with higher inrush currents such as motor control and fluorescent lighting installations in industrial buildings where nuisance tripping might occur if a faster type was used
