Inverter technology with IGBT Voltage input (V): 380–400 Three-phase, 50/60 Hz frequency (Hz) Current (A) output: 20–500 50% duty cycle: 500A at 60% Voltage (V) at no load: 75 A maximum output current of 500 Electrode diameter (mm): 2.5–6.0; no accessories are included enclosed in a carton box