Miller · 907909

Thunderbolt 210 MV

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

Miller

907909

Thunderbolt 210 MV

Output120 V: 10–110 A. 240 V: 10–210 A.

Duty120 V: 65 A at 60% duty cycle and 50 A at 100% duty cycle. 240 V: 135 A at 60% duty cycle and 105 A at 100% duty cycle.

Input1-phase power, 120 V or 240 V, 50/60 Hz. Maximum amps input at rated load output: 27.8 A at 120 V and 44.9 A at 240 V. The cord includes multi-voltage plugs for 120 V and 240 V.

PlugPlug named, type not printed

10 min cycle, 120V

60% · 6.0 min on · 4.0 min off · 65 A

First percent on the sheet for this voltage. 120 V: 65 A at 60% duty cycle and 50 A at 100% duty cycle.

10 min cycle, 240V class

60% · 6.0 min on · 4.0 min off · 135 A

First percent on the sheet for this voltage. 240 V: 135 A at 60% duty cycle and 105 A at 100% duty cycle.

Does not pass 120V/15A

Sheet

Copied from the cited page. Not taken from another model or a review.

Spec	Published value	Source, checked 2 November 2026
Process	Stick (SMAW).	Quick specs, Process
Output amp range	120 V: 10–110 A. 240 V: 10–210 A.	Quick specs, Amperage Range
Rated duty cycle	120 V: 65 A at 60% duty cycle and 50 A at 100% duty cycle. 240 V: 135 A at 60% duty cycle and 105 A at 100% duty cycle.	Specifications table, Rated Output
Input voltage and plug	1-phase power, 120 V or 240 V, 50/60 Hz. Maximum amps input at rated load output: 27.8 A at 120 V and 44.9 A at 240 V. The cord includes multi-voltage plugs for 120 V and 240 V.	Quick specs and the specifications table
Wire or rod size	Not published by manufacturer	This is a stick welder. The quick specs do not print an electrode-diameter range.
Weight	13 lb.	Specifications table, net weight
Material thickness	Maximum mild steel thickness: 120 V, 1/8 in. 240 V, 1/2 in.	Quick specs, Maximum Mild Steel Thickness

Notes on the source

Open-circuit voltage in the specifications table is 9.5 V.

Manufacturer page · Job check · Miller

From the table

What output does the Thunderbolt 210 MV publish?

120 V: 10–110 A. 240 V: 10–210 A. Source: https://contenthub.itwwelding.com/api/public/content/miller-electric-mfg-llc/spec-sheet/PIM/91ef29-dc37-1.pdf

What duty cycle does the Thunderbolt 210 MV publish?

120 V: 65 A at 60% duty cycle and 50 A at 100% duty cycle. 240 V: 135 A at 60% duty cycle and 105 A at 100% duty cycle. Source: https://contenthub.itwwelding.com/api/public/content/miller-electric-mfg-llc/spec-sheet/PIM/91ef29-dc37-1.pdf

What input does the Thunderbolt 210 MV publish?

1-phase power, 120 V or 240 V, 50/60 Hz. Maximum amps input at rated load output: 27.8 A at 120 V and 44.9 A at 240 V. The cord includes multi-voltage plugs for 120 V and 240 V.

Which processes does the Thunderbolt 210 MV publish?

stick.