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 overcenter, trip free toggle mechanism with quick make, quickbreak 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 QOB bolt on circuit breaker with common trip is rated as 125 A, 120/240 VAC. This unit provides 22 kA breaking capacity. A full line of factory installed accessories is also available such as shunt trips, auxiliary switches and alarm switches. QO breakers use a compact 3/4 inch width design for small system footprint. QO circuit breakers are UL Listed under UL File E84967 and are CSA Certified under CSA Master Contract 153555