What products does Sibitweld manufacture?

Sibitweld manufactures professional welding equipment including MIG welders (250A-500A), TIG welders (200A-500A), MMA stick welders (120A-630A), plasma cutters (40A-200A), welding torches, consumables, laser welding systems, and automation solutions. We are the world's first manufacturer to implement Silicon Carbide (SiC) technology in welding equipment, delivering 30% higher efficiency and 40% lighter weight compared to traditional IGBT welders.

What is SiC (Silicon Carbide) technology in welding equipment?

Silicon Carbide (SiC) technology represents the next generation of welding equipment design. SiC semiconductors switch faster than traditional IGBT modules, resulting in more stable arcs, better efficiency (up to 90%), reduced weight (40% lighter), improved duty cycles, and lower heat generation. Sibitweld is the world's first manufacturer to successfully implement SiC technology in welding machines.

Where is Sibitweld located and how does this benefit customers?

Sibitweld's manufacturing facilities are located in Qingdao, Shandong Province, China, just 5 minutes from Qingdao Port - one of China's largest international shipping hubs. This strategic location enables faster international shipping, reduced freight costs (up to 35% savings), and seamless logistics coordination for customers in over 80 countries worldwide.

What certifications do Sibitweld products have?

All Sibitweld welding equipment is CE certified and manufactured according to ISO 9001:2015 quality management standards. Our products meet international safety and performance standards, ensuring compliance for use in Europe, North America, Australia, and other major markets worldwide. We provide comprehensive 2-year warranties on all products.

How much can I save by purchasing from Sibitweld?

Customers typically achieve 30-35% cost savings compared to equivalent Western brands, without compromising on quality. As a direct manufacturer located 5 minutes from Qingdao Port, we eliminate middleman markups and reduce shipping costs while maintaining rigorous quality control and international certifications. We also offer flexible minimum order quantities and OEM/ODM services.

Does Sibitweld offer OEM and ODM services?

Yes, Sibitweld offers comprehensive OEM (Original Equipment Manufacturer) and ODM (Original Design Manufacturer) services. We can customize welding equipment with your brand name, specifications, colors, and packaging. Our flexible manufacturing capabilities support orders from small batches to large-scale production, with professional technical support throughout the process.

What is the warranty period for Sibitweld products?

Sibitweld provides a comprehensive 2-year warranty on all welding equipment. Our warranty covers manufacturing defects and component failures under normal use conditions. We also offer lifetime technical support and readily available spare parts to ensure long-term reliability of your equipment.

What is the minimum order quantity for Sibitweld products?

Sibitweld offers flexible minimum order quantities to accommodate different business needs. For standard models, we can accept orders starting from 10 units. For OEM/ODM customized products, the minimum order quantity typically starts from 50 units. Contact our sales team for specific requirements and volume pricing.

How long does shipping take from Sibitweld?

Shipping times vary by destination and shipping method. From our Qingdao Port location: Sea freight to North America takes 15-25 days, to Europe 25-35 days, to Southeast Asia 7-15 days, and to Australia 15-20 days. Air freight is available for urgent orders with delivery in 5-7 days worldwide. We work with major international freight forwarders to ensure reliable delivery.

What payment methods does Sibitweld accept?

Sibitweld accepts multiple payment methods including T/T (Telegraphic Transfer), L/C (Letter of Credit), PayPal, and Western Union. For established customers, we offer flexible payment terms including 30% deposit with 70% balance before shipment, or other arrangements based on order volume and business relationship.

      
      MMA-400 STGMulti-Process Capability
Comprehensive welding versatility with high-frequency TIG, scratch TIG, MMA welding, and arc gouging in one system
Advanced SiC Technology
50kHz high-frequency operation with 85% efficiency and 100% duty cycle at 400A for continuous professional performance
Professional Features
100% arc ignition with hot start, adjustable arc force, cellulose electrode support, and 100m remote control capability

                  400A@100%
                  Duty Cycle (Tested at 40°C)
              
                  10-400A
                  TIG (CC)
              
                  0-400A
                  MMA (CC)

A blue SIBIT MMA 400 STG welding machine with control knobs, digital display, and connection ports.

MMA-400 STG Technical Specifications
      
        MMA-400 STG Technical Specifications
        
            Parameter
            Unit
            Specification
          
            Power Supply
          
            Input Voltage Range
            V
            3-Phase 380V AC ±15%
          
            Rated Input Voltage
            V
            380
          
            Recommended Input Voltage Range
            V
            330 ~ 430 (Best Performance)
          
            Power Supply Frequency
            Hz
            50
          
            Rated Input Capacity
            kVA
            17
          
            Rated Input Current
            A
            25.8
          
            Power Factor
            -
            0.8
          
            Output Characteristics
          
            No-Load Output Voltage
            V
            70
          
            TIG Welding Current Range
            A
            10 ~ 400
          
            MMA Welding Current Range
            A
            0 ~ 400
          
            Arc Starting Current
            A
            0 ~ 400
          
            Arc Force Current
            A
            0 ~ 400
          
            Current Decay Time
            s
            0 ~ 8
          
            Performance Specifications
          
            Rated Duty Cycle @ 40°C
            %
            100% @ 400A
          
            Efficiency
            %
            85
          
            Technology & Features
          
            Advanced Technology
            -
            Silicon Carbide (SiC) Technology
          
            Welding Processes
            -
            MMA / TIG / Arc Gouging
          
            Protection System
            -
            Overheat Protection
          
            Cooling System
            -
            Air Cooling
          
            Standards & Certification
          
            Ingress Protection
            -
            IP23S
          
            Insulation Class
            -
            Class H
          
            Physical Specifications
          
            Dimensions (L × W × H)
            mm
            512.5 × 220 × 398
          
            Net Weight
            kg
            19.2
          
            Gross Weight
            kg
            21.0

MMA-400 STG Technical Specifications
Parameter	Unit	Specification
Power Supply
Input Voltage Range	V	3-Phase 380V AC ±15%
Rated Input Voltage	V	380
Recommended Input Voltage Range	V	330 ~ 430 (Best Performance)
Power Supply Frequency	Hz	50
Rated Input Capacity	kVA	17
Rated Input Current	A	25.8
Power Factor	-	0.8
Output Characteristics
No-Load Output Voltage	V	70
TIG Welding Current Range	A	10 ~ 400
MMA Welding Current Range	A	0 ~ 400
Arc Starting Current	A	0 ~ 400
Arc Force Current	A	0 ~ 400
Current Decay Time	s	0 ~ 8
Performance Specifications
Rated Duty Cycle @ 40°C	%	100% @ 400A
Efficiency	%	85
Technology & Features
Advanced Technology	-	Silicon Carbide (SiC) Technology
Welding Processes	-	MMA / TIG / Arc Gouging
Protection System	-	Overheat Protection
Cooling System	-	Air Cooling
Standards & Certification
Ingress Protection	-	IP23S
Insulation Class	-	Class H
Physical Specifications
Dimensions (L × W × H)	mm	512.5 × 220 × 398
Net Weight	kg	19.2
Gross Weight	kg	21.0

MMA 400STG Silicon Carbide (SiC) 3-Phase DC TIG/MMA Welding Machine | Advanced SiC Technology

Product Overview

SILICON CARBIDE (SiC) TECHNOLOGY @ 50kHz · 100% DUTY CYCLE

Advanced Silicon Carbide (SiC) welding system operating at 50kHz frequency with 100% duty cycle at 40°C. Specially designed for harsh industrial environments with friendly user operation interface and stable arc for manual welding. Industry-first SiC implementation delivers high-performance DC TIG and stick welding for alloy fabrication, pipe welding, and workshop maintenance with 400A TIG / 400A MMA output, 85% efficiency, multi-process capability (high-frequency/scratch TIG, MMA), wired remote control functionality, cellulose electrode compatibility, and generator compatibility in a compact 19.2kg configuration (512.5×220×398mm) with optimized dust/water protection.

Industry-First SiC Technology: 400A @ 100% Duty Cycle

400A TIG / 400A MMA at 100% duty cycle (40°C) with 50kHz SiC technology—industry-first Silicon Carbide welding system specially designed for harsh industrial environments enables continuous operation without thermal interruption, 85% efficiency compared to conventional 70-75%, friendly user operation interface with digital display, stable arc for manual welding, 100% arc starting success rate with HF/Scratch TIG, adjustable parameters (arc force, hot start, down-slope time), 2-step or 4-step trigger mode, wired remote control, extra arc force current for deep penetration and perfect vertical down-welding of cellulose electrodes (CEL), 100m remote control capability, generator compatibility (optional), optimized dust/water protection, and lightweight 19.2kg design (512.5×220×398mm) representing 2/3 the size and weight of conventional units.

Target Applications

Harsh industrial environments, alloy fabrication, pipe welding, workshop maintenance, long-distance welding operations, construction projects, manufacturing facilities, and field construction requiring maximum duty cycle and cellulose electrode compatibility.

Core Technology

Silicon Carbide @ 50kHz, 100% duty cycle at 40°C, HF/Scratch TIG with 100% arc starting success rate, adjustable parameters (arc force, hot start, down-slope time), 2-step/4-step trigger mode, digital display, wired remote control, 85% efficiency, 0.8 power factor, optimized dust/water protection.

Protection Systems

Comprehensive overheat, overcurrent, and short-circuit protection. Optimized dust/water protection for harsh industrial field conditions. IP23S rating, Grade H insulation, voltage fluctuation tolerance, generator compatibility (optional).

Key Features

Industry-first Silicon Carbide welding technology for harsh industrial environments

Silicon Carbide Technology

Industry-first SiC semiconductors operating at 50kHz—superior switching performance, 85% efficiency compared to conventional 70-75%, extremely low energy loss, reduced thermal output, compact architecture.

100% Duty Cycle at 400A

Continuous operation at 400A without thermal interruption at 40°C ambient temperature. Maximizes productivity and eliminates downtime in extended welding operations and high-intensity tasks.

Harsh Industrial Environment Design

Specially designed for harsh industrial environments with optimized dust/water protection, robust inner structure, and unconditional usage for optimum welding results under severe conditions.

Friendly User Operation Interface

Intuitive user interface with digital display for voltage and current monitoring, easy parameter adjustment, and simplified operation for enhanced productivity and reduced training time.

Stable Arc for Manual Welding

High-frequency inverter technology ensures stable current and soft arc for manual welding. Maintains consistent arc performance even during power fluctuations or arc length changes with beautiful weld formation.

High-Performance DC TIG & Stick Welding

Provides high-performance DC TIG and stick welding for alloy fabrication, pipe welding, and workshop maintenance with professional-grade arc characteristics and weld quality.

HF/Scratch TIG: 100% Arc Starting Success Rate

High-frequency and scratch TIG ignition with 100% arc starting success rate ensures reliable arc initiation every time without failed starts or electrode contamination.

Adjustable Parameters

Comprehensive parameter adjustment: arc force (0-400A), hot start (0-400A), and down-slope time (0-8s) provide precise control for various welding conditions and applications.

2-Step or 4-Step Trigger Mode

Selectable 2-step or 4-step trigger mode for TIG welding provides operational flexibility for different welding techniques and operator preferences.

Digital Display

Dual digital displays for voltage (V) and current (A) provide clear, precise readouts for accurate monitoring and control during welding operations.

Wired Remote Control

Wired remote control enables flexible operation up to 100 meters with remote adjustment of welding current, force current, and down-slope time for enhanced process control.

Generator Compatibility (Optional)

Optional generator compatibility with voltage fluctuation tolerance (320-415V input range) ensures reliable operation with generator power sources for field construction applications.

Multi-Process Capability

High-frequency TIG (10-400A), scratch TIG (default on startup), and MMA welding (0-400A). Supports cellulose electrodes (CEL) and all-position welding for operational flexibility.

Hot Start Function

Ensures 100% arc ignition with guaranteed reliable arc initiation. Adjustable hot start (0-400A) for all welding positions and stable performance during voltage variations.

Adjustable Arc Force

Brings great performance for all-position welding with independent arc force adjustment (0-400A) for precise control and superior arc characteristics.

Down-Slope Time Control

Adjustable TIG arc down-slope time (0-8s) provides precise control of welding completion phase, preventing crater cracks and ensuring clean weld termination.

Extra Arc Force Current

Ensures deep penetration and brings perfect vertical down-welding of cellulose electrodes (CEL) with superior arc performance and weld quality for demanding applications.

100m Remote Control Capability

Extended remote control capability up to 100 meters enables flexible operation in large work areas with support for remote adjustment of welding parameters.

Long Distance Welding

Suitable for 100m welding operations with full power input ensuring stable arc during long cable welding and voltage fluctuation for extended reach applications.

85% Efficiency

Industry-leading 85% efficiency with 0.8 power factor reduces energy consumption and operational costs. SiC technology delivers superior performance with 17kVA input capacity.

Cellulose Electrode Compatibility

Specially designed for MMA welding with cellulose electrodes (CEL) with extra arc force current for deep penetration and perfect vertical down-welding performance.

High-Frequency TIG Ignition

Professional high-frequency arc starting delivers clean, non-contact TIG ignition. Activated by pressing TIG torch switch for superior arc stability and control characteristics.

Scratch TIG Capability

Default scratch start method on startup for TIG welding. Alternative for environments where high-frequency ignition may interfere with sensitive electronic equipment.

Lift TIG Process Support

Supports lift TIG process for versatile TIG welding applications and operational flexibility across different welding scenarios and requirements.

Comprehensive Protection

Multi-level thermal monitoring, overcurrent protection, short-circuit safety. IP23S environmental resistance, Grade H insulation for extended operational life and operator safety.

Compact & Lightweight Design

512.5×220×398mm, 19.2kg—2/3 the size and weight of conventional units. SiC technology enables lightweight design while maintaining 400A output capacity and 100% duty cycle performance for easy transport on construction sites and confined spaces.

Standard Quick Connectors

Two Chinese-style 50mm quick connectors (standard) for fast and secure cable connections, reducing setup time and improving efficiency.

Optional Remote Control Box

Optional wired remote control box available for enhanced process control and operational flexibility without being at the machine during welding operations.

M5 Hex Key Included

M5 hex key included (standard) for maintenance and adjustment operations, ensuring convenient servicing and operational readiness.

Material Compatibility

Carbon Steel

Low Alloy Steel

Stainless Steel

Cast Iron

Applications

Silicon Carbide technology for professional industrial operations and harsh environments

Alloy Fabrication & Pipe Welding

Alloy fabrication
Pipe welding
Workshop maintenance
Structural steel work
Precision TIG welding

Ironwork & Metal Fabrication

Ironwork production
Door and window processing
Fence manufacturing
Metal enclosure production
Steel furniture manufacturing

Construction & Installation

Building installation
Interior decoration
Renovation projects
Equipment installation
Field construction welding

Maintenance & Repair Services

Machinery maintenance
Agricultural equipment repair
Motorcycle repair
Automotive maintenance
Industrial machinery service

Application Scenarios: Harsh industrial environments, alloy fabrication, pipe welding, workshop maintenance, long-distance welding operations (up to 100m), all-position welding requirements, cellulose electrode (CEL) applications, generator power supply situations. This welding machine series is designed for professional industrial applications, particularly suitable for high-quality welding requirements under severe conditions with optimized dust/water protection and friendly user operation interface.

Silicon Carbide Technology Advantages

Industry-first SiC implementation in welding equipment

50kHz Operating Frequency

SiC operates at 50kHz—substantially higher than conventional IGBT technology (20-30kHz) delivering superior switching performance, extremely low energy loss, and enhanced efficiency.

85% Efficiency Rating

SiC delivers 85% efficiency compared to conventional 70-75% IGBT efficiency—substantial energy optimization, reduced operational costs, and improved welding machine efficiency.

Reduced Thermal Output

Superior thermal conductivity and lower switching losses result in reduced heat generation, enabling 100% duty cycle in lightweight 19.2kg configuration without thermal interruption.

Compact Architecture

Higher frequency operation enables reduced transformer and component dimensions—lightweight 19.2kg design (512.5×220×398mm) at 400A output capacity, 2/3 the size and weight of conventional units.

Optimized Power Efficiency

Lower conduction and switching losses translate to improved efficiency, reduced thermal output, and optimized 17kVA input capacity for 400A output with reduced energy consumption.

Industry-First Implementation

Industry-first implementation of SiC technology in professional welding equipment—establishing new performance standards for industrial welding systems with advanced iterative product design.

Technical Innovation: The MMA 400STG represents an industry-first implementation of Silicon Carbide technology in welding equipment. SiC semiconductors operating at 50kHz (compared to conventional 20-30kHz) deliver 85% efficiency (versus typical 70-75%) with extremely low energy loss, enabling 100% duty cycle at 400A in a 19.2kg configuration (2/3 the size and weight of conventional units). Specially designed for harsh industrial environments with friendly user operation interface, stable arc for manual welding, and high-performance DC TIG and stick welding for alloy fabrication, pipe welding, and workshop maintenance. This represents an advanced iterative product design establishing new performance standards for professional industrial welding operations.

Summary

The MMA 400STG features industry-first Silicon Carbide (SiC) technology—advanced SiC-powered welding system operating at 50kHz frequency with extremely low energy loss. Specially designed for harsh industrial environments with friendly user operation interface and stable arc for manual welding. Provides high-performance DC TIG and stick welding for alloy fabrication, pipe welding, and workshop maintenance. Delivers 400A TIG / 400A MMA at 100% duty cycle (40°C) with continuous operation capability without thermal interruption. HF/Scratch TIG with 100% arc starting success rate ensures reliable arc initiation every time. Adjustable parameters: arc force (0-400A), hot start (0-400A), and down-slope time (0-8s) provide comprehensive control. 2-step or 4-step trigger mode for TIG welding operational flexibility. Digital display with dual voltage and current readouts for precise monitoring. Wired remote control enables flexible operation up to 100 meters with remote parameter adjustment. Generator compatible (optional) with voltage fluctuation tolerance (320-415V range). Multi-process functionality: high-frequency TIG (10-400A), scratch TIG (default on startup, activated by pressing TIG torch switch for high-frequency TIG), and MMA welding (0-400A). Specially designed for MMA welding with cellulose electrodes (CEL) with extra arc force current ensuring deep penetration and perfect vertical down-welding performance. Lift TIG process support for versatile TIG welding applications. 85% efficiency (Cosφ=0.8) compared to conventional 70-75% with 17kVA input capacity. High-frequency inverter technology ensures stable current and soft arc, maintaining consistent arc performance even during power fluctuations or arc length changes with beautiful weld formation. Optimized dust/water protection for harsh industrial field conditions with special inner structure ensuring robust design with unconditional usage for optimum welding results. Comprehensive overheat, overcurrent, and short-circuit protection systems. IP23S rating, Grade H insulation, air cooling system. Compact 512.5×220×398mm, 19.2kg configuration—2/3 the size and weight of conventional units for easy transport on construction sites and confined spaces. Two Chinese-style 50mm quick connectors (standard), M5 hex key included (standard), optional wired remote control box available. Compatible with carbon steel, low alloy steel, stainless steel, and cast iron. Optimized for alloy fabrication, pipe welding, workshop maintenance, ironwork production, door and window processing, fence manufacturing, metal enclosure production, steel furniture manufacturing, building installation, interior decoration, renovation projects, equipment installation, machinery maintenance, agricultural equipment repair, motorcycle repair, automotive maintenance, and industrial machinery service. Suitable for harsh industrial environments, long-distance welding operations, all-position welding requirements, cellulose electrode (CEL) applications, and generator power supply situations. Industry-first iterative product delivering superior performance for professional industrial welding operations under severe conditions.

Industry-First SiC Technology: 400A @ 100% Duty Cycle

Industry-first Silicon Carbide welding system delivers 400A TIG / 400A MMA at 100% duty cycle with 50kHz operation—specially designed for harsh industrial environments with friendly user operation interface, stable arc for manual welding, high-performance DC TIG and stick welding for alloy fabrication, pipe welding, and workshop maintenance. Advanced SiC technology enables continuous operation without thermal interruption, 85% efficiency compared to conventional 70-75%, HF/Scratch TIG with 100% arc starting success rate, adjustable parameters (arc force, hot start, down-slope time), 2-step/4-step trigger mode, digital display, wired remote control, generator compatibility (optional), extra arc force current for cellulose electrode (CEL) applications, 100m remote control capability, optimized dust/water protection, and lightweight 19.2kg design (2/3 the size and weight of conventional units) for professional industrial welding operations under severe conditions.

Why Choose Sibit Welding Equipment?

Partner with Sibit for industry-leading welding equipment that delivers precision, reliability, and performance in every weld.

Core Advantages

Precision Engineering

Experience superior weld quality through meticulously engineered equipment designed to deliver consistent, accurate results in every application.

Advanced Technology

Boost productivity and efficiency with cutting-edge welding technology that streamlines operations and maximizes output.

Reliable Performance

Count on uninterrupted operation with robust equipment built for demanding industrial environments and continuous use.

Key Benefits

Comprehensive Range

Access a complete selection of equipment and accessories tailored to meet all your welding requirements and applications.

Expert Support

Benefit from dedicated technical assistance and professional service ensuring optimal performance and maximum uptime.

Proven Excellence

Trust in equipment backed by rigorous quality control and industry-leading standards for consistent results.

Partner with Sibit for Excellence

Discover industry-leading welding equipment that delivers precision, reliability, and performance in every weld. Our commitment to quality and innovation ensures your success.

Contact us today to learn more about our products and how they can transform your welding operations and drive business growth.