Square D™ E-FRAME Miniature Circuit Breaker, Type EDB Molded Case Standard, 277/480Y VAC, 20 A, 50/60 Hz, 18 kA Interrupt, E Frame, Thermal/Magnetic Trip, 270 to 875 A Trip, 3 Pole, 3 ph, Lug, 12 to 6 AWG, 14 to 6 AWG Wire, Bolt-On Mount, 40 deg C, 4.05 in L x 2.94 in W x 5.66 in H