Kemppi MST245ACDCGM Master T 245 AC/DC GM 110/240V Power Source
The Master T TIG welding machine sets the benchmark for weld quality, usability, and energy efficiency in professional DC and AC/DC TIG welding. Built for welders who demand precision and companies who value efficiency, Master T combines advanced welding performance with durability and ergonomics to excel in any environment.
Every Master T ACDC model comes equipped with two industry-leading features as standard:
- MAX WeldClean – transforms your Master T TIG welding machine into a powerful electrolytic cleaner, allowing you to make welds customer-ready without extra equipment.
- Demagnetisation mode – eliminating material magnetism for improved arc stability and direction.
Available in power variants up to 400 A, Master T delivers a smoother arc ignition, reduced noise levels, and enhanced control, ensuring consistent, high-quality results from start to finish. Weld Assist technology speeds up setup, even at lower currents, helping you meet tight deadlines without compromising weld quality.
The Master T’s modular design lets you tailor your setup with alternative control panels, wireless remotes, and transport carts. Its robust, lightweight construction, crafted from impact-resistant injection-moulded plastic, is designed to withstand the toughest welding conditions while remaining easy to handle. Paired with Kemppi's Flexlite TX TIG torches, you get unmatched comfort and arc control for long shifts.
For welders, this means a reliable, easy-to-use machine that delivers top tier results every time. It’s an investment in future-fit welding technology that improves productivity, reduces downtime, and supports sustainable, energy-efficient operations.
Features
- AC/DC TIG and MMA welding capability
- Multi-voltage 110V / 230V single-phase operation
- Maximum output of 240 A
- Smooth, reliable arc ignition with reduced noise levels
- Weld Assist for faster, guided setup
- Double Pulse TIG for enhanced control and heat management
- MicroTack function for precise tack welding
- AutoCool for efficient cooling control
- MAX WeldClean electrolytic cleaning process (ACDC models)
- DeMagnetization mode to eliminate residual magnetism
- Large 7-inch premium display with clear user interface
- Alternative control display options available
- Wired and wireless remote control compatibility (Bluetooth)
- Robust, impact-resistant injection-moulded casing
Technical Data
| Mains connection voltage | 220...240 V ±10 % |
| Mains connection voltage (MV low range) | 110...120 V ±10 % |
| Mains connection phases | 1~50/60 Hz |
| Mains connection cable type | 3G, H07RN-F |
| Mains connection cable size | 2.5 mm² |
| Rated maximum input power [S1max] | 6 kVA |
| Mains fuse | 16 A |
| Mains fuse (@MV low range) | 16 A |
| Idle power | 20 W |
| Output, duty cycle % at rated max. current, TIG | 30 % |
| Output at +40 °C, rated max current, TIG | 240 A |
| Output at +40 °C, 60% TIG | 200 A |
| Output at +40 °C, 100% TIG | 170 A |
| Output, duty cycle % at rated max. current, MMA | 37 % |
| Output at +40 °C, rated max current, MMA | 180 A |
| Output at +40 °C, 60% MMA | 150 A |
| Output at +40 °C, 100% MMA | 120 A |
| Output, duty cycle % at rated max. current, TIG (@MV low range) | 40 % |
| Output at +40 °C, rated max current, TIG (@MV low range) | 130 A |
| Output at +40 °C, 60% TIG (@MV low range) | 120 A |
| Output at +40 °C, 100% TIG (@MV low range) | 90 A |
| Output, duty cycle % at rated max. current, MMA (@MV low range) | 40 % |
| Output at +40 °C, rated max current, MMA (@MV low range) | 85 A |
| Output at +40 °C, 60% MMA (@MV low range) | 75 A |
| Output at +40 °C, 100% MMA (@MV low range) | 55 A |
| Output range, TIG | 5 A / 1 V ... 240 A / 30 V |
| Output range, MMA | 10 A / 10 V ... 180 A / 40 V |
| Output range, TIG (@MV low range) | 5 A / 1 V ... 130 A / 24 V |
| Output range, MMA (@MV low range) | 10 A / 10 V ... 85 A / 35 V |
| Power factor at rated maximum current [λ] | 0.99 |
| Efficiency at rated maximum current [η] | 84 % |
| EMC class | A |
| Arc-on signal for relay | 24 V / 50 mA |
| Stick electrode diameter | 1.6 ... 5 mm |
| Voltage supply for cooling unit | 220...240 V |
| Welding connection type | R1/4 |
| Wired communication type | Analog, Kemppi Remote-Bus |
| Wireless communication type | Bluetooth |
| Transmitter frequency and power | 2400...2483.5 MHz, 10 dBm |
| Operating temperature | -20 ... 40 °C |
| Storage temperature | -40 ... 60 °C |
| Recommended minimum generator power [Sgen] | 8 kVA |
| Degree of protection (fully installed) | IP23 |
| External dimensions, length | 544 mm |
| External dimensions, width | 205 mm |
| External dimensions, height | 443 mm |
| Weight without accessories | 19.1 kg |
| Standards | IEC 60974-1,-3,-10, IEC 61000-3-12, GB 15579.1 |