HELP identifie rectifier values

[Anonymous1135]

Hi, I need help identifying the amps and voltage of the diode. I came off my welder I'm trying to fix but the part number on it comes up with nothing on Google search. I hope someone can help me out thanks in advance

Number on the rectifier 1504t2a27

 

[Minder]

Looks almost as if this is 6 diodes in parallel, it is obviously a Motorola part, if obsolete you could use stud mount types and make another bank up, is this a TIG welder?
M.

 

[Anonymous1135]

It's actually a mig welder it has 12 of those diodes all together in a plate

 

[Minder]

Are they in parallel or at least half and half?
M.

 

[Anonymous1135]

Are they in parallel or at least half and half?
M.

I don't think so it looks like their in series because all 12 diode bolt on to the aluminum plate.

I can find the diode on ebay but their rated at 25 amp and 200 v now I don't know what the ones I took out are rated at

 

[Minder]

MIG is not usually higher than 40-48v tops.
So it just the current that is the main concern.
If bolted to the same plate then it could be a parallel or set up in a bridge configuration, usually, but 6 is an odd number, It should be easy to work out how they are configured.
M.

 

[Anonymous1135]

MIG is not usually higher than 40-48v tops.
So it just the current that is the main concern.
If bolted to the same plate then it could be a parallel or set up in a bridge configuration, usually, but 6 is an odd number, It should be easy to work out how they are configured.
M.

So I should be fine with these

http://www.ebay.com/itm/172292280940

The welder I got is 120volt and 70 amps

 

[Minder]

Should be OK, The rectifiers would normally be on the secondary so the voltage should be alot less than 120v.
M.

 

[Anonymous1135]

Should be OK, The rectifiers would normally be on the secondary so the voltage should be alot less than 120v.
M.

Thank you, you been really helpful

 

[Sunnysky]

These shud replace each group with mods to bolting to heatsink
http://www.ebay.com/itm/Electronic-...003621?hash=item484fe43ea5:g:GCkAAOSwjVVVtZeA