Square D, QOU120, Standard Mount Miniature Circuit Breaker, 120/240 V AC, 20 A, 50/60 Hz Frequency, 10 kA Interrupt, QOU Frame, Thermal Magnetic Trip, 1 Pole, 1 ph, Toggle Actuator, Box Lug Connection, 14 to 2 AWG Wire, DIN Rail/Flush Mounting, 104 deg F, 2.95 in L x 0.75 in W x 4.05 in H Dimensions, Black