500A NOARK Enclosed Moulded Case Circuit Breaker (MCCB), UL 489 listed, Ex9M4 series, 3-poles (3P3d), Rated current: 500A, Neutral pole with 100% protection, Interrupting capacity: 50kA (600Vac), Lugs on both load and line sides (4-wires), Thermal-Magnetic (adjustable) (AT/AM (Adjustable Thermal / Adjustable Magnetic)), Trip unit: NEMA 12, equivalent to E124BM4H500T3L