Square D™ Miniature Circuit Breaker, Type QOU Standard, 240 VAC, 20 A, 50/60 Hz Frequency, 10 kA at 240 VAC, 5 kA at 48 VDC Interrupt, Thermal/Magnetic Trip, 3 Pole, Ring Tongue Connection, 14 to 2 AWG Al/Cu Wire, DIN Rail/Surface Mounting, 14 to 140 deg F, 2.25 in W x 2.95 in D x 5 in H Dimensions