Square-D / Schneider - Square D QO3451021 3-Pole 45 Amp 240 Volt Plug-On Miniature Circuit Breaker

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 QO miniature breaker is rated as 45 A, 120/240 V, and 3 pole. This unit provides 10 kA breaking capacity and plug in mounting. A full line of factory installed accessories is also available such auxiliary switches, alarm switches, and shunt trips. This unit has a factory installed shunt trip. 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