Characteristic: 1. DC MMA welder/industry welding . 2. Inverter technology welding equipment. 3. MOSFET welding machinery. Specification: 1. Input power voltage(V): 3-380V±15% 50/60HZ 2. Rated input power capacity(KVA): 25 3. no load voltage(V): 72 4. Output current adjustment(A): 40-500 5. Rated output voltage(V): 40 6. Rated duty cycle(%): 60 7. No load loss(W): 40 8. Efficiency(%): 85 9. Power factor: 0.93 10. Rank of insulation: F 11. Rank of protection: IP21 12. Weight(Kg): 35 13. Dimensions(mm): 580×334×480