Sigma Select 400 CA

Compact. Air cooled.

Sigma Select is a high-performance MIG/MAG welding machine. It is designed for dedicated manufactures and sub-suppliers of all sizes who must deliver high quality welds. With an efficient and powerful Sigma Select in your CoWelder solution, you will be able to accept the most complicated welding assignments.


Sigma Select is upgradable
With Sigma Select, you will always be able to adjust your welding setup to match any changes in demand. Simply upgrade the welding machine with new programs or functions.

Great welding performance
Sigma Select shows an amazing welding performance with great start-stop abilities. That is fundamental for carrying out the best quality weld seams with CoWelder. It delivers a stable and focused arc and has an impressive duty cycle; 400 A at 60%/20°C.

Keep cool with air cooling
Top top-of-the-line air cooled torched for your CoWelder will make sure that you can keep the productivity level high. Choose air cooling if you intent to weld small components with few or short welds seams.


  • Synergic DC
  • Automat torch
  • Trolley
  • Graphic Remote
  • 3m earth cable
  • 1 set of wire feed rolls
  • Program Package: Standard
Technical data

Welding machine
Current range 15-400 A
Mains voltage +/÷ 15% (50-60Hz) 400 V
Fuse type C 20 A
Mains current, effective. 17.5 A
Mains current, max. 26.0 A
Power, 100% 12.1 kVA
Power, max. 18.0 kVA
Efficiency 0.85 | 0.8
Power factor 0.90
Duty cycle 100% /20°C (MIG) 345 A/100%/31.5 V
Duty cycle max. /20°C (MIG) 400 A/65%/34.0 V
Duty cycle 100% /40°C (MIG) 300 A/100%/29.0 V
Duty cycle 60% /40°C (MIG) 370 A/60%/32.5 V
Duty cycle max. /40°C (MIG) 400 A/50%/34.0 V
Open circuit voltage 65-70 V
Protection class IP 23
Application class S/CE
Standards IEC60974-1. IEC60974-10 Cl. A
Dimensions (H x W x L) 700 mm x 260 mm x 735 mm
Weight 52 kg

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