The Lincoln – Invertec 300TPX TIG/GTAW Welder (300 A, Portable, DC) is engineered for professional welders requiring precision and durability. Its lightweight but rugged casing makes it suitable for hazardous environments, while advanced inverter technology ensures stable DC TIG performance.
Equipped with HF and Lift TIG ignition, 2T/4T modes, variable down slope, post-flow control, and built-in pulse functionality, the Invertec 300TPX provides flexibility for welding carbon steels, stainless steels, and aluminum alloys. A unique pre-settable starting mode ensures excellent HF arc starts under any conditions.
The welder includes a digital pre-set meter with hold function, 10 memory locations for personal parameter settings, and TIG Spot welding mode. It also supports MMA (stick) welding with a wide range of electrodes, including cellulosic types. For extended use, it can be converted to water-cooled operation with the COOL ARC® 21 unit.
Built to last, the Invertec 300TPX features IP23 electrical safety, potted PC boards, and optimized airflow to reduce contamination and extend service life. Optional carts provide easy mobility.
TECHNICAL DETAILS:
| Specification | Details |
| Brand | Lincoln Electric |
| Model | Invertec 300TPX |
| Type | TIG/GTAW + MMA (DC) |
| Input Voltage | 400 V (three-phase) |
| Output Current | Up to 300 A |
| Ignition Modes | HF TIG, Lift TIG |
| Welding Modes | DC TIG, Pulsed TIG, MMA, TIG Spot |
| Control Features | 2T/4T, variable down slope, post-flow, pulse frequency, memory storage (10 sets) |
| Digital Display | Pre-set meter with hold function |
| Protection Class | IP23 (rugged construction) |
| Cooling | Air-cooled (optional water cooling with COOL ARC® 21) |
| Applications | Industrial fabrication, repair & maintenance, structural steel, stainless steel, aluminum alloys |






