AHP AlphaTIG 203Xi
#2 in AC/DC TIGFull review
A complete, hard working AC/DC TIG for the home fabricator who welds aluminum often. Its duty cycle beats most machines near its price.
Amazon $689 AHP $670$670
The AHP AlphaTIG 203Xi is the better TIG or stick welder overall, rated 4.2 to 3.9. The AHP AlphaTIG 203Xi leads on duty cycle and features. The ArcCaptain TIG200P AC/DC wins on warranty. The ArcCaptain TIG200P AC/DC costs $20.01 less ($649.99 vs $670).
ArcCaptain TIG200P AC/DC
#8 in AC/DC TIGFull review
A well equipped AC/DC TIG for a home shop that wants aluminum on a budget and a long warranty. Buy it from the maker store, where it costs far less.
Amazon $899.99 ArcCaptain $649.99$649.99
Prices were last checked November 2, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the AHP AlphaTIG 203Xi for duty cycle (60% at full output (200 A) vs 25% at full output (200 A)) and features (high-frequency start, pulse, foot pedal in the box, dual voltage vs high-frequency start, pulse, dual voltage).
- Choose the ArcCaptain TIG200P AC/DC for warranty (5-year warranty on the machine vs 3-year warranty on the machine).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every AC/DC TIG TIG or stick welder; a clear win is highlighted. How we rank explains each one.
| Factor weight | AHP AlphaTIG 203Xi | ArcCaptain TIG200P AC/DC |
|---|---|---|
| Overall rating | 4.2/5 | 3.9/5 |
| Value 30% | 68 $3.35 per amp ($670, 200 A maximum) | 70 $3.25 per amp ($649.99, 200 A maximum) |
| Duty cycle 20% | 100 60% at full output (200 A) | 12 25% at full output (200 A) |
| Features 25% | 100 high-frequency start, pulse, foot pedal in the box, dual voltage | 75 high-frequency start, pulse, dual voltage |
| Warranty 25% | 50 3-year warranty on the machine | 100 5-year warranty on the machine |
Specifications
| AHP AlphaTIG 203Xi | ArcCaptain TIG200P AC/DC | |
|---|---|---|
| Output | ||
| Processes | AC/DC TIG, stick | AC/DC TIG, stick |
| Maximum output | 200 A | 200 A |
| Maximum on 120 V | 150 A | 120 A |
| Duty cycle | 60% at 200 A | 25% at 200 A |
| Duty cycle ambient | 40 °C | - |
| Input | 120 V and 240 V | 120 V and 240 V |
| Features | ||
| Pulse | Yes | Yes |
| Foot pedal in the box | Yes | No |
| TIG torch in the box | Yes | Yes |
| Voltage reduction device | - | Yes |
| Weight | 40 lb | 26.5 lb |
| Warranty | 3 years | 5 years |