Miniature Circuit Breaker PA66 Flame Retardant Housing 4P Automatic Circuit Breaker for Commercial Building AC 400V 16A Item Type: Miniature Circuit Breaker Material: PA66 Rated Insulation Voltage (Ui): 500VAC Pollution Level: 3 Withstand Impulse Voltage (Uimp): 6kV Magnetic Trip: B Curve: (3-5)ln C Curve: (5-10)ln D Curve: (10-14)ln Thermal Trip Reference Setting Temperature: 30℃ Use Category: A, in line with IEC60898-1 Current Limiting Level: 3 Single Pole Breaking Capacity (Icn1): Icn1=Icn(6000A) Protection Class (IEC60529): Circuit Breaker Cody: IP20 Installed in the Distribution Box: IP40, insulation class is Ⅱ Overvoltage Category (IEC60364): Ⅳ Damp Heat Resistance (IEC60068-1): Class 2 (at 55°C, relative humidity 95%) Wiring Method: Top in and bottom out, bottom in and top out Function: Short circuit protection, overload protection, control isolation Electrical Life: 10000 times Mechanical Life: 20000 times Ambient Temperature: -35℃-70℃ Storage Environment Temperature: -40℃-85℃ Voltage: 400V