Miller Millermatic® 355 – MIG/Pulsed MIG Welder (208/240/460/575V)

The Miller Millermatic® 355 MIG/Pulsed MIG Welder is a powerful, easy-to-use solution built for manufacturing, fabrication, and professional welding applications. Featuring a 7-inch color LCD screen with Auto-Set™ Elite technology, Trigger Program Select, and an Electronic Parameter Chart, this all-in-one welder increases efficiency, reduces setup time, and ensures consistent weld quality.

Weighing only 99 lbs, the Millermatic® 355 is more than 40% lighter than comparable models, making it portable enough for shop, field, or mobile applications. Compatible with any North American input power (208/240/460/575V, single- or three-phase), this versatile machine delivers exceptional weld performance on aluminum, stainless steel, and mild steel up to 1/2 inch thick.

Key Features & Benefits

• Easy-to-Use Interface – 7" color LCD display simplifies setup and parameter selection, boosting productivity.

• Pulsed MIG Welding – Reduces heat input for less distortion on thin materials, decreases spatter, and minimizes post-weld grinding and rework.

• Trigger Program Select – Switch between saved weld settings directly at the gun for maximum efficiency.

• Versatile Welding Capabilities – MIG, Pulsed MIG, and Flux-Cored welding in one machine.

• Bernard BTB 300A MIG Gun with AccuLock™ S Consumables – Provides flawless wire feeding, superior arc performance, and ergonomic comfort to reduce welder fatigue.

• Portability – At just 99 lbs, this machine is easy to move, with optional EZ-Latch™ running gear for secure transport and quick dismounting.

• Generator Compatible – Full output when powered by 19,000-watt generators or larger.

• Locks & Limits Function – Controls weld parameter ranges to ensure WPS compliance.

• USB Port – Update software, back up settings, or transfer weld programs between units.

• Auto-Set™ Elite – Predefined weld settings help operators of all skill levels achieve consistent, high-quality welds.

What’s Included

• Millermatic® 355 power source with 9 ft (2.7 m) industrial power cord

• 15 ft (4.5 m) 300A Bernard BTB MIG gun with AccuLock™ S consumables (.035"/.045" wire)

• 10 ft (3 m) work cable with clamp and 50 mm Dinse-style connector

• Flow gauge regulator and gas hose (Argon or Ar/CO2 mix)

• Reversible drive rolls (.035"/.045")

• Extra .035" and .045" contact tips

• Material thickness gauge

Applications

• Manufacturing & Industrial Fabrication

• Construction & Structural Steel Work

• Transportation & Automotive Repair

• Welding Education & Training

• Mobile Fabrication & MRO

Specifications

• Processes: MIG (GMAW), Pulsed MIG (GMAW-P), Flux-Cored (FCAW)

• Amperage Range: 20 – 400 A

• Material Thickness Capacity: Aluminum 18 ga. – 1/2" | Mild Steel 22 ga. – 1/2" | Stainless 22 ga. – 1/2"

• Rated Output: 310 A at 29.5 V, 60% duty cycle

• Open Circuit Voltage: 90 VDC

• Wire Feed Speed: 50–800 IPM (1.3–20 m/min)

• Wire Diameter Capacity: .023"–.052" (depending on material type)

• Spool Size: 12 in (305 mm)

• Weight: 99 lbs

• Dimensions: 26.25" L x 13.75" W x 19.25" H

• Input Power: 208/240/460/575V (single- and three-phase)

• Warranty: 3-Year Miller True Blue® Warranty

Why Choose the Millermatic® 355?

With advanced pulsed MIG capabilities, an intuitive LCD interface, and compatibility with any North American power input, the Millermatic® 355 is built to maximize productivity while ensuring consistent, high-quality welds. From fabrication shops to jobsite welding, this machine combines portability, precision, and reliability—backed by Miller’s True Blue® Warranty.