The PowerPact® Q-frame line of circuit breakers include QB, QD, QG and QJ molded case circuit breakers and QB automatic switches. They are rated 240 Vac, 250A max. and are available in lug or bus-connected unit-mount constructions, or I-Line® group-mounted construction. PowerPact Q-frame circuit breakers are rated for 240 Vac (208Y/120 Vac for 3-pole 100 kA) and are available with UL® Listed interruption ratings from 10 kA to 100 kA. Unit-mount circuit breakers are available with lugs on both ends for cabled applications or with mounting studs for bus-mounted applications. These circuit breakers may be mounted in individual enclosures, metering devices, panelboards or switchboards. The PowerPact Q-frame circuit breaker is a direct replacement for the Q2 Series device.