Square D QO QOT2020CP Circuit Breaker, Miniature, Tandem, 20 A, 1-Pole, 120/240 V, Thermal Magnetic Trip, Black | The industry leader in circuit protection is easily recognized by the industry's only trip indicator. The red Visi-Trip Indicator makes it easy to spot a tripped circuit breaker. Compact 3/4 in wide format for one-pole circuit breakers helps minimize panel space and footprint. The Square D exclusive Qwik-Open protection is standard on all 15 A and 20 A circuit breakers trip reaction within 1/60th of a second. No other circuit breaker trips faster.