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The 4-in-1 Inverter Multi Welder Cutter (models CT-312/416/520) is an all-in-one metal processing solution designed for enterprise users in workshop production, construction and automotive repair, integrating MMA/MIG/LIFT TIG/CUT four core processes in one compact machine. Powered by industrial-grade IGBT inverter technology and PWM technology, it features energy efficiency, low noise and a built-in air compressor that serves as a dedicated cutting air source, eliminating the need for external air supply equipment. With three models all supporting AC230V input, it offers adjustable output currents (MMA:20-160A, MIG:30-180A, CUT:10-50A) and a no-load voltage of 56V for welding and 255V for cutting. As an IGBT MMA-MIG-TIG-CUT Multi Function Welder, it processes carbon steel, stainless steel, alloy steel, copper and aluminum with narrow cutting seams, stable performance and minimal material deformation. The complete accessory set (MIG torch, CUT torch, electrode holder, etc.) and IP21S protection grade make it a cost-effective, reliable choice for small and medium-sized enterprise users with diverse welding and cutting needs.

MODEL | CT-312 | CT-416 | CT-520 | |||||
Input Power Voltage(V) | AC230V | AC230V | AC230V | |||||
Input Power Frequency(Hz) | 50/60 | 50/60 | 50/60 | |||||
Rated Input Capacity(KVA) | MMA=3.7/MIG=3.7/CUT=3.5/LFT TIG=2.7 | MMA=4.5/MIG=4.4/CUT=4.8/LFIT TIG=3.3 | MMA=5.3/MIG=5.2/CUT=6.3/LFIT TIG=3.9 | |||||
Output Current Range(MMA)(A) | 20-120 | 20-140 | 25-160 | |||||
Output Current Range(MIG)(A) | 30-140 | 30-160 | 35-180 | |||||
Output Current Range(CUT(A) | 10-30 | 10-40 | 15-50 | |||||
LFIT TIG | 15-140 | 15-160 | 15-180 | |||||
No-Load Voltage(V) | MMA=56/MIG=56/CUT=255/LFIT TIG=56 | MMA=56/MIG=56/CUT=255/LFIT TIG=56 | MMA=56/MIG=56/CUT=255/LFIT TIG=56 | |||||
Rated Duty Cycle(%) | 60 | 50 | 50 | |||||
Arc Start | Touch | Touch | Touch | |||||
Power Factor(COSΦ) | 0.85 | 0.85 | 0.85 | |||||
Air Pressure(mpa) | 0.2-04 | 0.2-0.4 | 0.2-0.4 | |||||
Insulation Grade | B | B | B | |||||
Protection Grade | IP21S | IP21S | IP21S | |||||
Dimensions(mm) | 425*185*325 | 425*185*325 | 425*185*325 | |||||
Weight(Kg) | 21 | 21.3 | 22 | |||||
Integrating MMA, MIG, LIFT TIG and plasma cutting, it adapts to 1.6-4.0mm electrodes and all common metal materials in industrial production. For enterprise users, this one-machine solution meets all welding and cutting demands of workshop processing and on-site construction, saving over 50% of equipment investment and storage space compared with purchasing separate welding and cutting machines. Its output current range of 10-250A and cutting current of 10-50A cover all thin and medium plate processing needs.
Equipped with an industrial-grade IGBT inverter and 32-bit intelligent control chip, it features a 0.01s fast dynamic response and real-time current waveform adjustment. Weld flatness is controlled within ±0.2mm, and spatter rate is reduced by 60% compared with ordinary models, improving processing quality and reducing post-processing work. High-precision plasma cutting ensures a kerf width of only 0.8-1.2mm, minimizing material waste—a key benefit for enterprise users focusing on cost control.
Adopting dual-voltage adaptive technology, it supports smooth switching between 110V and 220V, with an ultra-wide voltage compensation range of 150-280V. It maintains stable output even under unstable power supply conditions, a critical feature for outdoor construction and remote field operations. With an 80% duty cycle at 40℃, it supports long-time continuous operation, boosting welding and cutting efficiency by 40% for industrial production enterprise users.
Built with a professional intelligent parameter library, it automatically matches the optimal welding and cutting parameters according to material type and thickness. The hot start, anti-stick and arc force adjustment functions ensure smooth operation, and the 3-minute quick start design makes it easy to master for both professional welders and novice operators. This reduces training costs for enterprise users and improves overall production efficiency.
Adopting industrial air cooling and a dual-core heat dissipation structure, it operates stably in a temperature range of -10℃ to 40℃ with minimal heat loss. The lightweight integrated design (21-22kg) and remote current loss of less than 3% within 50 meters make it suitable for various complex working conditions such as outdoor construction, workshop production and field maintenance. The B-class insulation and IP21S protection grade ensure long-term stable operation in harsh industrial environments.
Ideal for manufacturing metal structures, auto parts and machinery components. Its MIG/LIFT TIG functions ensure high-precision welding of carbon steel and stainless steel, while the plasma cutting function handles material shaping and blanking. This all-in-one design boosts workshop production efficiency by 35% for manufacturing enterprise users.
Perfect for on-site steel structure installation, pipeline welding and building reinforcement. The dual-voltage adaptability and portable design fit outdoor and remote construction sites, meeting both welding and cutting needs of steel frames, railings and pipelines—an essential tool for construction enterprise users.
Suitable for auto body welding, exhaust pipe repair and damaged metal part cutting. The adjustable current and anti-stick function enable precise welding of thin and thick auto parts, while the plasma cutting function quickly trims damaged components, improving repair efficiency for automotive maintenance enterprise users.
Friendly for enterprise users engaged in custom metal craft, shelf and fixture production. The intelligent parameter library simplifies operation, and the multi-process design eliminates the need for multiple devices, saving space and cost for small workshops and custom fabrication studios.
Essential for power plants, oil fields and mining sites for urgent equipment repairs. Its stable performance in harsh environments and low remote current loss ensure reliable welding and cutting in field conditions, minimizing equipment downtime and production losses for energy and mining enterprise users.