The Square D by Schneider Electric QO 30 Amp Single-Pole Bolt-On Circuit Breaker is ANSI certified and CSA and UL listed. The unit is intended as a branch circuit breaker in a bolt-on installation and is suitable for use in NQOD panel boards. This breaker has a Qwik-Open feature and Visi-Trip indicator that helps you easily identify a tripped circuit in the panel.