THQB Q-line miniature/moulded case circuit breaker. 40 A, 2-pole. 120/240 or 208Y/120 VAC. Non-interchangeable trip style. LIG trip function. Q-line frame type. Standard continuous current rated. Suitable for reverse feed. 14 to 8 KCMIL (copper) or 12 to 8 KCMIL (aluminium) wire range, solid or stranded for 14 to 10 AWG. Fixed long time and instantaneous. Q-line circuit breakers are one-inch wide per pole, compact, thermal-magnetic devices designed for residential and commercial applications. The QB breakers are bolt-on versions of the Q-line used for bolting to the bus connections of load centers and lighting panels. All Q-line circuit breakers feature quick-make or quick-break mechanisms, common trip bars and easy to spot trip indication to ensure safety and reliability. Internal common trip.