QOU315 Square D Circuit Breaker, 3-Pole, 240 VAC, 15 Amps.Schneider Electric Circuit Breaker The 3 Pole thermal magnetic circuit breaker features a line load lug terminal and accommodates aluminum copper wire size of 14 2 AWG. It has 35 mm DIN rail flush surface mounting, standard flush and provides protection against over current. It measures 2. 250 Inch x 2. 630 Inch x 4. 050 Inch. Circuit breaker is UL listed and CSA certified.