555 Pro 400 Mma Welding Machine

The 555 PRO 400 is a professional-grade MMA welding machine designed for both workshop and field use, offering trusted reliability and advanced smart controls. It features over-current, over-voltage, and overheating protection, along with auto shut-down on overload. An intelligent fan cooling system reduces dust accumulation and extends machine life, while an LED display clearly shows welding parameters. The one-knob system automatically adjusts the current, delivering flawless welds with ease.
Performance-wise, the PRO 400 offers Hot Start and Arc Force functions for instant ignition, and its advanced IGBT soft-switch ensures a stable, smooth arc. With a current range of 20180 amps, it handles both thin and heavy workpieces and is compatible with 6010, 6011, and 7018 electrodes. Generator-friendly design accommodates voltage fluctuations, and the lightweight yet durable build makes it portable and ideal for demanding environments. The PRO 400 is backed by dependable support and comes with a complete starter kit for immediate use.
Technical Specs: Rated Input Voltage: 1 Phase 220 15%, Input Frequency: 50/60 Hz, Rated Input Power: 18.2 KVA, Current Range: 30180 A, Duty Cycle: 140 A at 40C/60%, 180 A at 40C/35%, No-load Voltage: 56 V, Efficiency: 85%, Power Factor: 0.93, Class of Insulation: F, Protection Class: IP21S.