QO 2-20 Amp Single-Pole Tandem Circuit BreakerContact your local building inspector for code adoptions and details. QO 2 20 Amp one pole tandem circuit breaker QO 20 Amp tandem one pole replacement circuit breaker offers 2 poles in the space of 1 as the replacement breaker is for use in old style, non class CTL QO load centers and has a maximum load of 240 Volt Breaker features Qwik Open and a Visi Trip indicator to easily identify a tripped breaker Trip thermally (in an overload situation) or