Square D - QO2020C Circuit Breaker, Gray The QO 20 Amp Tandem Single-Pole Circuit Breaker features 2 circuits in the space of 1. The breaker has 2 tandem poles, each rated for up to 20 Amp. The unit uses a thermal-magnetic tripping mechanism with a Visi-Trip indicator that helps you easily identify a tripped circuit. This 2-pole breaker is for use in old-style, non-class, CTL QO load centers. Features Learn about general NEC 2020 updates, contact your local building inspector for code adoptions and details Designed to protect against overloads and short-circuits Compatible only with QO panels that allow tandem breakers Trip thermally (in an overload situation) or magnetically (under a short circuit situation) Plug-in installation USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.