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Here are some representative images of 400 A inverter CO₂ (MIG/MAG) welding machines—heavy-duty industrial welders designed for gas-shielded MIG welding using CO₂ or mixed gases. These units often also support other modes like MIG/MAG, MMA (stick), TIG, and flux-cored welding.

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Overview: 400 A Inverter CO₂ Welding Machines

What are they?

These are inverter-based MIG/MAG welding machines capable of delivering up to 400 amperes—suitable for thick metal fabrication, industrial workshops, and heavy structural welding.

"CO₂ welding machine" typically refers to a MIG welder using carbon dioxide as the shielding gas.

Key Features

IGBT Inverter Technology: Offers efficient, stable arc control, smoother welding, and portability.

Multi-function Capability: Many units support MIG/MAG (gas and gasless), MMA (stick), TIG, and flux-cored welding.

High Duty Cycle: Often rated 60% at max output (400 A), enabling sustained welding.

Portability: Compact designs with external wire feeders and handles.

Advanced Controls: Features like Hot Start, Anti-Stick, Arc Force, VRD, voltage compensation, and adjustable wire feed speeds.

From image captions and specs:

Example: A MIG-400 IGBT inverter supports MIG/MAG, MMA, and flux-cored welding, with IGBT modules and a portable separated wire feeder.

The MIG-400T model adds LIFT TIG, spool guns, 2T/4T controls, and a cylinder rack—ideal for multi-process work.

Generic heavy-duty CO₂ MIG machines show rugged build and accessories typical for industrial uses
India: Available Models & Marketplace Options

Here are some 400 A inverter welding machines available via Indian retailers:

ARC 400i Portable Inverter Welding Machine

Heavy-duty 400 A ARC unit, IGBT-based, 85% efficiency.

Features: 100% duty-cycle at 310 A, 60% at 400 A, compact (24.5 kg), wide 60–400 A range.
M400-107 Dual-Phase 400 A Inverter ARC

Input: 220 V / 380 V; built for heavy-duty use.

Tech features: IGBT, Hot Start, Anti-Stick, Arc Force, VRD, voltage compensation.

Cheston 400 A Ultra MIG/MMA Welding Machine

Dual-mode MIG + MMA, IGBT inverter, includes torch, mask, accessories.

Handy for users needing both MIG and stick welding.

BMB ARC-400 A Inverter Welding Machine

Supports 1, 2 & 3-phase input.

Designed for generator and fluctuating supply environments.

Speedweld 400 A Inverter Welding Machines

Portable models; options supporting 1–3 phase operation.

I couldn’t find retail listings specifically tagged as “400 A inverter CO₂ welding machine,” but here are relevant high-amp inverter welders that suit heavy-duty CO₂/MIG needs:

3‑Phase