

ALFA IN is the leading Czech manufacturer of the welding machines and gas filters.
| Product | Mains voltage | Welding current | Method | ||
| SHARC 320 T (DC) | 3x400V~ ±15% / 50-60Hz | detail >> | |||
| SHARC 420 T (DC) | 3x400V~ ±15% / 50-60Hz | detail >> | |||
| SHARC 620 T (DC) | 3x400V~ ±15% / 50-60Hz | detail >> | |||
| SHARC 320 T (AC/DC) | 3x400V~ ±15% / 50-60Hz | detail >> | |||
| SHARC 420 T (AC/DC) | 3x400V~ ±15% / 50-60Hz | detail >> | |||