MDQ-300A

I bought this BR to convert my older Century AC “BuzzBox” welder to DC, as other buyers have done & as shown on several YouTube videos. I chose to retain the AC welding connections and tied the bridge rectifier into the existing system using new 2-gauge welding cable and adhesive-type heat shrink. It works! And it works great! Really makes welding with 7018 rod a breeze (cleaner welds, easier to keep burning rods, less splatter, less current required). Keep in mind that for clean 7018 welding, you will need to use a POSITIVE ground; this didn’t work so well for me with 6011 so I switched back to Negative ground for 6011 and it worked great that way. I installed Riverweld Tig-welding plugs/connectors so I can easily switch between Positive/Negative ground depending upon which type of rod I am using. Very happy with this Bridge Rectifier!

I have done plenty of AC to DC welders with these..Everytime I need one for a welder..I reach for these!!

I used this to turn a cracker jack lincoln AC stick welder into a DC which makes a HUGE difference. Now I just need to add an internal fan to up the duty rating.

Used to rectify my welder and add DC as another option

Worked great on my ac buzzbox! It's a real stick welder now. I was at 135a on ac welding 1/4" steel with 1/8 6011 had to drop it all the way down to 75. I'm am very impressed with how well it works so far but I have only burnt 5 rods the day I wired it up. Can't speak on longevity yet. Don't count on a seccond review because I won't remember to come back and write one.

The actual product is different from the one on the web.... But.... None the less all the specs are exactly the same... So that's all that matters... However the product is a solid product.... Nothing cheap....! I'm using to convert a AC welder to DC... and this heavy duty rectifier will do the job... Would recommend to anyone looking to do the same.... Solid product... You won't be disappointed...!

Using to update my little welder from strictly AC to DC as an additional benefit.

Running on a Lincoln Idealarc 250 and burns up after abotu 40 hours welding time never ran over 225 amps guess I gotta buy a 500 amp if I want it to last.