Q Line Circuit Breakers Are One-Inch Wide Per Pole, Compact, Thermal-Magnetic Devices Designed For Residential and Commercial Applications. The QC Breakers Are Lug-Lug Versions Of The Q Line and Are Available For 35MM Din Rail Mounting. All Q Line Circuit Breakers Feature Quick-Make / Quick-Break Mechanisms, Common Trip Bars, and Easy to Spot Trip Indication to Ensure Safety and Reliability. Q Line Breakers Are Available In 1, 2, and 3 Pole Versions and Can Be Ordered With Auxiliary Contact and Shunt Trip