standard: IEC1008, GB16916, BS EN61008 rated voltage (Un): 2pole: 230V AC 4pole: 400V AC rated current (In): 25, 40,63A rated residual operating current (In):30,100,300,500mA rated residual non-operating current (Ino):0.5ln residual current off-time:&le0.1s minimum value of rated making and breaking capacity(Im):1KV rated conditional short-circuit current(Inc): In=25,40A Inc=1500A In=63A Inc=3000A installation: on symmetrical DIN rail (With surge protective function)