Square D, QO120, 1-Pole Miniature Circuit Breaker, Standard, 120/240 V AC, 20 A, 50/60 Hz Frequency, 10 kA Interrupt, QO Frame, Thermal Magnetic Trip, 1 Pole, 1 ph, Pressure Plate Connection, 14 to 8 AWG Wire, Plug-On Mounting, 40 deg C, 3 in H x 0.75 in W x 2.91 in D Dimensions