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QO(B) circuit breakers come in plug-on or bolt-on options and a complete range of amperages and interrupting ranges to fit into various QO distribution panels. QO is the “World’s Finest” Industry leading offer since 1955, with features engineered for faster installation, reliability and quality.
The industry leader in circuit protection is easily recognized by the industry's only trip indicator — the red Visi-Trip™ Indicator makes it easy to spot a tripped circuit breaker. Compact 3/4 inch wide format for one-pole circuit breakers helps minimize panel space and footprint. The Square D™ exclusive Qwik-Open™ protection is standard on all 15 A and 20 A circuit breakers — trip reaction within 1/60th of a second. No other circuit breaker trips faster.
A comprehensive selection of 10kA rated circuit breakers are available including:
Plug-on QO circuit breakers are for use in QO load centers, NQ panelboards or Speed-D switchboard distribution panels. Bolt-on QOB circuit breakers are for use in NQOD panelboards.