q Line Circuit Breakers Are One-inch Wide Per Pole, Compact, Thermal-magnetic Devices Designed For Residential And Commercial Applications. The Qc Breakers Arelug-lug Versions Of The Q Line And Are Available For 35mm Din Rail Mounting. Allq Line Circuit Breakers Feature Quick-make / Quick-break Mechanisms, Common Tripbars, And Easy To Spot Trip Indication To Ensure Safety And Reliability. Q Linebreakers Are Available In 1, 2, And 3 Pole Versions And Can Be Ordered With Auxiliary Contact And Shunt Trip Accessories.