Maxstar 161 STH vs TIG225X

Same fields. Each cell is that model's published text. A blank stays "Not published by manufacturer." The outlet chip does not hide either column.

By the WeldFacts editorial team · Checked 2 November 2026 · How we verify

Spec	Maxstar 161 STH	TIG225X
Process	Stick (SMAW), Lift-Arc TIG (GTAW), high-frequency TIG (GTAW), and pulsed TIG (GTAW-P). High frequency and pulse are marked STH model only. Source	AC/DC TIG and stick. The page tells the operator to use AC for aluminum and magnesium and DC for steel, stainless, and most other metals. Source
Output amp range	120 V: 5–130 A DC TIG and 20–90 A DC stick. 240 V: 5–160 A DC TIG and 20–160 A DC stick. Source	TIG 10–225 A. Stick 10–180 A. Source
Rated duty cycle	TIG, 120 V: 90 A at 13.6 VDC, 100% duty cycle, and 130 A at 15.2 VDC, 30%. TIG, 240 V: 110 A at 14.4 VDC, 100%, and 160 A at 16.4 VDC, 20%. Stick, 120 V: 60 A at 22.4 VDC, 100%, and 90 A at 23.6 VDC, 30%. Stick, 240 V: 110 A at 24.4 VDC, 100%, and 160 A at 26.4 VDC, 20%. Source	TIG: 40% at max output, and 100% at 108 A on 120 V or 155 A on 240 V. Stick: 40% at max output, and 100% at 76 A on 120 V or 139 A on 240 V. Source
Input voltage and plug	120–240 V, 1-phase. Amps input at the higher duty-point ratings: TIG 22.6 A at 120 V and 15.05 A at 240 V; stick 23.16 A at 120 V and 22.55 A at 240 V. Separate 120 V and 240 V power cords are included. Source	120 V / 240 V, single-phase, 50/60 Hz. Input amperes and a plug name are not in the specifications list. Source
Wire or rod size	Not published by manufacturer Source	Not published by manufacturer Source
Weight	13 lb. (5.9 kg). Source	41 lb (18.5 kg). Source
Material thickness	Not published by manufacturer Source	The page says it can weld materials up to 1/2 inch thick. Source

Outlet check, Maxstar 161 STH · Outlet check, TIG225X