Rated input Voltage 220v/50Hz/S.hp Range of Current 55 - 260 Open Circuit Voltage 52v Current at 50% duty cycle 220 Amp. Current at 100% duty cycle 170 Amp. Max. Electrode Weld 10 . No. Type of Cooling Fan Cooled Switch recommended 32Amp. Insulation Class H Dimension 8" x 11" x 8.5"