SSimder TIG-250AC 6 in 1 AC Pulse TIG Welder

The Simder Welder TIG-250 is a 250A 6-in-1 AC/DC TIG welder that welds aluminum with AC Pulse TIG, runs DC TIG for stainless and titanium, handles stick for thick steel, and gives you Synergic one-knob mode for clean first welds. Dual 110V/220V input with foot pedal support covers garage and shop work — most 200A competitors stop short.

At a Glance

Built For

• Aluminum welding — AC Pulse TIG cleans the oxide layer and welds aluminum panels, plate, and structural work up to 250A
• Home garage DIY — AC/DC TIG, pulse, and stick in one machine; Synergic one-knob mode flattens the learning curve
• Auto body & custom fab — aluminum panels, exhaust, and thin stainless with clean, precise beads
• Pro shops — Manual mode with full pulse parameter control (width, frequency, slope, currents) and foot pedal support
• First-time TIG users — Synergic mode auto-matches current, gas, and pulse settings to one dial
• Not for industrial production lines — duty cycle is prosumer grade, not 24/7 factory
• Not for MIG or plasma cutting — the TIG-250 is a TIG/stick machine; for MIG + plasma, see the MIG-250 or SD-4050 Pro

Full Specifications

How It Compares

Can it weld aluminum with AC Pulse TIG?

Yes. AC Pulse TIG cleans the aluminum oxide layer while pulsing controls heat input, so you can weld aluminum sheet and thin plate up to about 250A without burn-through — no separate spool gun, no MIG wire needed.

What is Synergic one-knob mode?

Synergic mode auto-matches current, gas flow, and pulse settings to one dial. You set the amperage and the machine handles the rest — ideal for first-time TIG users learning to lay clean beads.

What pulse parameters can I adjust in manual mode?

Up/down slope, initial current, background current, pulse width, pulse frequency, and pilot arc current — full control for pro-level aluminum, stainless, and titanium work.

What is SPOT welding mode?

SPOT mode welds timed tack points with adjustable spot time — useful for positioning thin sheet, tacking panels before a full weld, and battery tabs or similar light work.

Does it really run on 110V household power?

Yes — dual 110V/220V input. On 110V the maximum output is reduced, which is fine for most home-garage work; plug into 220V for full 250A output.

Welding an aluminum trailer or boat repair?

Use AC Pulse TIG with 250A on tap. The pulsing cleans the oxide layer and controls heat on thin sheet, so you can tack panels in position and lay a clean bead without burn-through.

Stainless steel kitchen or exhaust work?

DC Pulse TIG keeps heat input low and steady — ideal for thin stainless, titanium, and small precision joints where color and distortion matter.

Teaching yourself to weld for the first time?

Start in Synergic one-knob mode — set the amperage, let the machine set the rest. 2T/4T keeps the arc steady while you learn travel speed, then move to Manual as you grow.

What's included in the box?

WP26 TIG torch, electrode holder, ground clamp, operation manual, gas tube, and a 220V conversion cord. A foot pedal is supported but sold separately.

What metals can it weld?

TIG: aluminum, ultra-thin stainless steel, titanium, carbon steel, alloy steel, and copper. Stick: thick plate, carbon steel, low-alloy steel, and cast iron.

Is the TIG-250 good for beginners?

Yes. Synergic mode auto-sets parameters, and 2T/4T/SPOT simplify the learning curve. Manual mode gives room to grow into professional Pulse TIG work.

Does it run on 110V or 220V?

Both. Dual 110V/220V input means it works on household outlets and shop circuits. Plug into 220V for full 250A output; on 110V output is reduced, which is fine for most home-garage work.

What is the difference between AC and DC TIG?

AC TIG is required for aluminum (it cleans the oxide layer); DC TIG is for steel, stainless, titanium, and copper. This machine does both, plus pulse variants of each.

How does it compare to 200A AC/DC TIG welders?

At $359.99, the TIG-250 gives you 250A output — 50A more than typical 200A AC/DC TIG machines — plus Synergic one-knob mode and 110V/220V dual voltage, without the premium price.

• WP26 TIG torch
• Electrode holder
• Ground clamp
• Operation manual
• Gas tube
• 220V conversion cord