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HELP identifie rectifier values

Discussion in 'General Electronics Discussion' started by Anonymous1135, Aug 14, 2016.

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  1. Anonymous1135

    Anonymous1135

    5
    0
    Aug 14, 2016
    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
     

    Attached Files:

  2. Minder

    Minder

    3,046
    645
    Apr 24, 2015
    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.
     
  3. Anonymous1135

    Anonymous1135

    5
    0
    Aug 14, 2016
    It's actually a mig welder it has 12 of those diodes all together in a plate
     

    Attached Files:

  4. Minder

    Minder

    3,046
    645
    Apr 24, 2015
    Are they in parallel or at least half and half?
    M.
     
  5. Anonymous1135

    Anonymous1135

    5
    0
    Aug 14, 2016
    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
     
  6. Minder

    Minder

    3,046
    645
    Apr 24, 2015
    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.
     
  7. Anonymous1135

    Anonymous1135

    5
    0
    Aug 14, 2016

    So I should be fine with these

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

    The welder I got is 120volt and 70 amps
     
  8. Minder

    Minder

    3,046
    645
    Apr 24, 2015
    Should be OK, The rectifiers would normally be on the secondary so the voltage should be alot less than 120v.
    M.
     
  9. Anonymous1135

    Anonymous1135

    5
    0
    Aug 14, 2016
    Thank you, you been really helpful
     
  10. Sunnysky

    Sunnysky

    483
    123
    Jul 15, 2016
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