QO-HM high-magnetic circuit breakers are recommended for area lighting (such as athletic fields, parking lots and outdoor signs), when using lamps of inherent high inrush current, individual dimmer applications or other applications where high inrush currents exceed standard tripping conditions. These circuit breakers are available in 1-pole 15 and 20 A ratings only. QO-HM circuit breakers are physically interchangeable with standard QO™ and QOB circuit breakers and accommodate the complete range of QO™ accessories.