CO₂/MAG/MIG Welding Machine

DP400(S-3)/DP500(S-3) DC pulse - Thumbnail

DP400(S-3)/DP500(S-3) DC pulse Professional CO₂/MIG/MAG Welding Machines

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OTC DAIHEN DP-400(S-3) / DP-500(S-3) are high-performance digital inverter welding machines from the OTC DAIHEN brand. Featuring intelligent waveform control technology, these welders are suitable for high-quality welding of various metal materials. The equipment automatically optimizes welding parameters according to different material types, ensuring stable welding processes, aesthetically pleasing weld seams, and reliable welding strength.

Core Features and Advantages

Intelligent Welding Modes

Supports DC pulse, DC double pulse, DC and other welding modes
DP-500(S-3) DC pulse duty cycle up to 400A 100%
Intelligent waveform control technology automatically optimizes welding parameters

Parameter Memory and Sharing

Can store 100 groups of welding conditions
Supports copying welding conditions and internal functions to other welders via USB interface
Facilitates standardized production and multi-device collaboration

Welding Data Recording and Analysis

Automatically records welding process data and fault information
Data can be exported via USB for quality analysis and fault tracing
Complies with modern manufacturing quality management requirements

Ease of Operation

Allows real-time current adjustment during welding using standard welding torches
Intuitive interface, easy to learn and operate
Multiple preset welding programs suitable for operators of different skill levels

Applicable Materials

OTC DAIHEN DP-400/DP-500 welding machines are suitable for welding the following materials:

Stainless Steel - Various stainless steel products
Galvanized Steel Sheet - Optimized welding for galvanized materials
Alloy Steel - High-strength alloy materials
Carbon Steel - Common metal materials

Welding Case Showcase

Below are actual welding results from OTC DAIHEN DP-400/DP-500 welding machines:

Figure 1: DP-400(S-3) welding carbon steel air reservoir case - Uniform and beautiful weld

Figure 2: DP-500(S-3) welding stainless steel fan case - Beautiful formation

As shown in the above cases, OTC DAIHEN welding machines deliver excellent welding results with uniform, aesthetically pleasing weld seams, demonstrating the high-quality welding performance of digital inverter welders.

Standard Technical Specifications

Detailed technical parameter comparison of OTC DAIHEN DP-400(S-3) and DP-500(S-3) welding machines:

Item	DP-400(S-3)	DP-500(S-3)
Rated Input Voltage	3-phase 380V±10% 50Hz	3-phase 380V±10% 50Hz
Rated Input Current	30A	30A
Rated Load Current	400A	500A
Rated Output Voltage	34V	39V
Rated Duty Cycle	60% (400A)	500A 60% / Pulse 400A 100%
No-load Voltage	64.7V	74.8V
Insulation Class	200℃	200℃
Dimensions (W×D×H)	685mm × 400mm × 612mm	685mm × 400mm × 612mm
Weight	55.2kg	59.4kg
Protection Rating	IP23S	IP23S

Accessories and Equipment

Wire Feeder: CM-H400S(GY) (Air-cooled)
Wire Diameter: 1.0/1.2mm (0.8/1.4/1.6mm optional)
Wire Feed Speed: 1.5–22 m/min
Wire Spool Capacity: Maximum 25kg
Welding Torch: WT3510-SBD(3M) / WT5000-SBD(3M)
Flowmeter: GH-25 (Standard) / GH-2501-36V (Optional)
Control Cable: 16-core, 3m length
Remote Control Box: QK0116B00 (2m) / QK0129B00 (3m)

OTC DAIHEN DP-400(S-3) and DP-500(S-3) digital inverter welding machines are professional welding solutions integrating advanced intelligent waveform control technology and digital inverter technology, providing stable welding performance. These welders support multiple welding modes and are suitable for welding various materials including stainless steel, carbon steel, and alloy steel. Ideal for automotive manufacturing, metal structures, equipment maintenance, and other industries.