QO and QOB one, two and three pole thermal magnetic circuit breakers provide overcurrent protection and switching on ac and dc systems. These circuit breakers have an over center, trip free toggle mechanism with quick make, quick break action and positive handle indication. They also have VisiTrip trip indication, which provides a visual indication that the circuit breaker has tripped and interrupted the circuit. This 2 pole QO main breaker is rated at 125A at 120/240VAC. This unit provides 22kA breaking capacity and bolt on mounting. A full line of features and factory installed accessories are also available such as shunt trips, auxiliary switches and alarm switches. This main breaker provides 22 kA breaking capacity. Breaker is for use in 200 A maximum MP, MPR, and MPH Meter Pak metering equipment. The breaker is 5.6 inches tall, 5.07 inches wide and 3.6 inches deep. This main breaker provides 22 kA breaking capacity. This main breaker will accept 4 AWG to 300 kcmil copper or aluminum wire. The breaker is 5.6 inches tall, 5.07 inches wide and 3.6 inches deep. The breaker is UL listed and CSA certified.