This two-pole thermal magnetic circuit breaker provides overcurrent protection and switching on ac and dc systems. It has an over center, trip-free toggle mechanism with quick-make, quick break action and positive handle indication. It also has VisiTrip trip indication, which provides a visual indication that the circuit breaker has tripped and interrupted the circuit. This is a QO miniature breaker, rated at 100 Amp, 120-Volt/240-Volt. It provides 22 kA breaking capacity and plug in mounting. It is compatible with Square D QO load centers, panels, Meter-Pak, EZM devices that accept 2-pole plug-in breakers. UL File E84967 and is CSA Certified under CSA Master Contract 153555.