QO and QOB 1, 2 and 3-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 one-pole QO bolt on miniature circuit breaker is rated as 20A, 120 VAC. This circuit breaker provides 22 kA breaking capacity. This circuit breaker is UL listed as SWD (switching duty) rated. It is suitable for switching 120 VAC fluorescent lighting loads. A full line of factory installed accessories, such as shunt trips, auxiliary switches and alarm switches are available. This circuit breaker has Class B 30mA ground fault with a pigtail. The pressure plate connectors will accept one 14 to 8 AWG copper or 12 to 8 AWG aluminum wire. This circuit breaker has a 4.12 in H x 0.75 in W x 2.91 in D. QO circuit breakers are UL listed under UL File E84967 and are CSA Certified under CSA Master Contract 153555.