400A Noark Enclosed Moulded Case Circuit Breaker (MCCB), UL 489 listed, Ex9M3 series, 3-poles (3P3d), Rated current: 400A, Neutral pole with 100% protection, Interrupting capacity: 18kA (600Vac), Lugs on both load and line sides (4-wires), Thermal-Magnetic (adjustable) (AT/AM (Adjustable Thermal / Adjustable Magnetic)), Trip unit: NEMA 3R, equivalent to E3R3AM3S400T3L