The Excellent Enterprises ARC-300 Single Phase MOSFET Inverter Welding Machine is the highest-capacity model in the ARC single-phase MOSFET series — built for fabrication contractors, infrastructure teams and heavy-repair crews who need serious MMA output without three-phase power. With a stable 20–300A DC output, electrodes up to 5.0mm, and IP21 protection, it pushes single-phase stick welding to its practical ceiling.
Product Overview
Engineered for heavy-duty fabrication, structural welding, pipeline repair and thick-section joining, the ARC-300 combines industrial output with inverter portability. Its MOSFET high-frequency platform delivers rapid arc response, reduced power loss and stable current under varying load, so welders get smooth deposition on demanding joints. Unlike bulky transformer 300A welders, it deploys easily between workshop and site.
Key Features
- 20–300A MOSFET inverter output — top of the single-phase MOSFET range.
- Electrodes up to 5.0mm for heavy fabrication and deep joints.
- Automatic Hot Start for fast, clean ignition with larger rods.
- Adaptive Arc Force that stabilises energy in deep-groove, fillet and variable-gap joints.
- Anti-Stick to cut current instantly on electrode sticking.
- IP21 protection plus overvoltage, overcurrent and overheat safeguards.
- Welds cast iron in addition to carbon, alloy and stainless steel.
Benefits
The ARC-300 lets a shop handle thicker sections and bigger rods than a 250-amp machine while staying on single-phase power — useful where three-phase isn’t available. Stable, adaptive arc control improves weld consistency on heavy joints, reduces sticking and spatter, and raises productivity; inverter efficiency keeps running cost down.
Technical Specifications
| Specification | Details |
|---|---|
| Model | ARC-300 |
| Technology | MOSFET Inverter |
| Input Voltage | AC 230V ±15% |
| Phase | Single Phase |
| Output Current | 20A – 300A |
| No-Load Voltage | 70–80V |
| Duty Cycle | 60% (DATA REQUIRED: confirm rated amperage) |
| Efficiency | 85%+ |
| Electrode Compatibility | Up to 5.0mm |
| Process | MMA / Arc (SMAW) |
| Protection Class | IP21 |
| Suitable Materials | Carbon Steel, Alloy Steel, Stainless Steel, Cast Iron |
| Protection | Overvoltage / Overcurrent / Overheat / Anti-Stick |
Material & Construction
Compact industrial inverter enclosure, protected front panel, forced-air cooling sized for 300A duty. (DATA REQUIRED: body material/finish, weight, cooling detail.)
Performance Advantages
Heavy-duty penetration for thick sections; adaptive arc force for consistent deposition on demanding joints; energy-efficient MOSFET switching; portable high-output design; reliable protection under unstable supply.
Applications
Heavy structural steel fabrication; pipeline welding and maintenance; bridge fabrication; pressure-vessel repair; EPC project welding; shipyard maintenance; heavy machinery repair; construction steelwork; heavy engineering fabrication.
Industries Served
Heavy fabrication · construction & infrastructure · pipeline · shipyards · plant & EPC maintenance · heavy engineering · structural steel.
Compatibility
Single-phase 230V (±15%); E6013/E7018 electrodes up to 5.0mm. Pairs with electrode holders, heavy welding cables, electrode drying ovens and PPE. (DATA REQUIRED: confirm minimum supply/breaker rating and DG-set compatibility — important at 300A draw.)
Buying Considerations
- Supply capacity: a 300A welding output on single-phase 230V draws high input current — confirm your line/genset can supply it (publish KVA/input current).
- Electrode/thickness: 5.0mm rods suit heavy fabrication; match rod and amperage to plate.
- Duty cycle: 60% (confirm rated amperage) — for heavy fabrication cycles; for continuous max output, consider the ARC-400 IGBT.
- What’s included & warranty: confirm before ordering.
Why Choose Excellent Enterprises
ISO 9001:2015-certified, ISI-compliant supplier, 500+ clients since 1997 (29+ years). Genuine, warranty-backed machines, bulk pricing, PAN-India delivery, GST invoicing, OEM/private-label and export support, 30-minute quote response.
Maintenance
Clear conductive dust from vents/fan path (dry, oil-free air); keep holder/earth-clamp contacts clean; inspect heavy cables/lugs; store dry; keep airflow clear to protect duty cycle.
Safety Considerations
Suitable helmet, FR clothing, gloves; ventilation/extraction; verified earthing; isolate before connection changes; follow IEC 60974-1 and site hot-work procedures.
Frequently Asked Questions
What is the ARC-300 used for? Heavy single-phase MMA welding — structural steel, pipeline, bridge and pressure-vessel work, and heavy machinery repair — with electrodes up to 5.0mm on a 230V supply. Is it single phase? Yes, AC 230V (±15%) single-phase, practical where three-phase access is limited. Which electrodes fit? Up to 5.0mm rods (e.g. E6013, E7018) for demanding fabrication and repair. ARC-300 or ARC-400 IGBT? Choose the ARC-300 as the top single-phase MOSFET for heavy fabrication; step up to the ARC-400 IGBT for continuous-duty heavy welding and greater durability. Can my single-phase supply run it? A 300A output draws high input current — confirm your line/genset against the rated input current/KVA (DATA REQUIRED) before purchase. What’s the duty cycle and IP rating? 60% duty (confirm rated amperage) and IP21 protection, with overvoltage/overcurrent/overheat safeguards.
Conclusion & CTA
The ARC-300 is the top single-phase MOSFET stick welder in the range — heavy-duty output, 5.0mm electrode capacity and IP21 protection in a portable inverter — from an ISO 9001:2015 supplier with 29+ years’ experience. Request a quote for pricing, supply guidance, bulk slabs and PAN-India delivery.
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