Square D™ QO140HID Type QO-HID Miniature Circuit Breaker, 120/240 VAC/48 VDC, 40 A, 1 Pole, Thermal Magnetic Trip

QO 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.