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OTC MR-400
Welding Machine OTC DAIHEN

OTC MR-400

DC welding machine with digital control and IC-Thyristor technology, up to 400A current, perfect for precise welding on various metal types.

Product Specification

IC-Thyristor DC Arc System OTC DAIHEN® MR-400

OTC MR-400 DC Arc Welding Machine

Industrial Strength • 400A Thyristor-Controlled Platform

OTC MR-400 is a high-performance DC arc welding machine designed for precision and efficiency in demanding industrial applications. Incorporating advanced IC-Thyristor technology, the MR-400 ensures exceptional arc stability and minimal spatter, resulting in high-quality, consistent welds across a wide range of conductive metals.

Key Features

  • Advanced IC-Thyristor Technology: Provides a remarkably stable arc and reduces spatter, directly enhancing overall weld quality.
  • Digital Control System: Enables precise, repeatable adjustment of welding parameters for consistent industrial results.
  • Arc Drive Control: A standard feature that actively prevents electrode sticking, facilitating smoother operation.
  • Constant Current Characteristics: Engineered to maintain a stable, steady welding current throughout the operation.

Operational Advantages

  • Enhanced Productivity: High 400A output and a 60% duty cycle support long, uninterrupted welding shifts.
  • Usability: Optional remote control box facilitates easy setting of welding conditions directly at the work site.
  • Durability: Rugged, industrial-grade construction ensures reliable performance in the most demanding work environments.
  • Operator Safety: Built-in protection features safeguard both the equipment and the welder during intensive use.

Technical Specifications

Parameter MR-400 Rating
Rated Output400 A
Current Range40 – 400 A
Rated Duty Cycle60%
No-load Voltage65.0 V
Weight148 – 151 kg

Infrastructure Requirements

Specification Detail
Input Voltage220V / 380V / 415V (3-Phase)
Protection ClassIP21
Dimensions (WxDxH)400 x 607 x 770 mm
Breaker Capacity75A (220V) / 50A (380V/415V)

Target Industrial Applications

The MR-400 is ideal for high-duty cycle requirements in:

Metal Fabrication Reliable steel and stainless welding for workshops.
Automotive Precise chassis and component assembly.
Construction Structural steel assembly for infrastructure.
Shipbuilding Heavy-plate welding for marine structures.

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