The Square D by Schneider Electric QO 30 Amp One-Pole Circuit Breaker provides overload and short-circuit protection for your electrical system. ANSI-certified and UL-listed, it is rated for 120/240 VAC and 10,000 AIR. This breaker features the exclusive Visi-Trip indicator; when tripped, the handle moves to a midpoint position between "OFF" and "ON," and a highly visible red indicator helps identify the tripped breaker easily. This design allows for quick identification among up to 42 circuit breakers in a load center. QO circuit breakers offer unique features not available from other manufacturers.