Specifications Parameter Specification Product Series EZD Series (Compact MCCB) Model / Frame Size Typically EZD400M (M Frame, 400A max) or EZD400E (E Frame, 400A max). The 320A rating is a setting within the 400A frame. Number of Poles 4 Poles (3P + N) – All four poles are protected. Rated Current (In) 320 Amperes Frame Current (Iu max) 400 A Trip Unit Type Fixed Thermal-Magnetic (TM-D) or Adjustable Electronic (E). The 320A is the fixed rating or the setpoint of the installed trip unit. Breaking Capacity (Icu @ 400V AC) 50 kA, 65 kA, or higher (Depends on specific catalog code). Rated Operational Voltage (Ue) 400/415 V AC (3P+N systems) Rated Insulation Voltage (Ui) 800 V AC Short-Time Withstand Current (Icw) Typically 15-25 kA for 1s (model dependent) Connection Front connection, screw terminals. Terminal Capacity Suitable for copper/aluminum cables (typical for up to 2x150mm²). Mounting Fixed mounting (panel or DIN rail adapter). Width (4P) Approximately 140 mm Mechanical Life 20,000 operations Electrical Life 8,500 operations at rated current Operating Temperature -25°C to +70°C Standards IEC/EN 60947-2, CCC, CE, RoHS