Molded Case Circuit Breaker, 20 A Amps, AC Voltage Rating 277/480V AC, Max. AIR Rating 18kA at 277/480V AC, For Use With GE AE Lighting Panels, Series TEY, Circuit Breaker Type Standard, Number of Poles 3, DC Voltage Rating 250V DC, Terminal Connection Lug, Trip Type Thermal Magnetic, Phase Three, Instantaneous Trip Fixed, Phase Connection ABC, Frame Size 125A/TEY, Circuit Breaker Mounting Style Bolt On Panelboard, Height 5.08 in, Width 3 in, Depth 3 in, Min. Wire Size 14 AWG