IRF3205, two different looks on ebay, are they both legitimate?

Discussion in 'General Electronics Chat' started by sdowney717, Apr 22, 2015.

  1. sdowney717

    Thread Starter Member

    Jul 18, 2012
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  2. Papabravo

    Expert

    Feb 24, 2006
    10,140
    1,789
    It is quite simply impossible to know what you are getting by looking at the markings. If I was going to buy parts on eBay, I'd buy a small quantity from a vendor until I could establish their reliability. People who sell on eBay risk a great deal by selling stuff that is not legit. A single complaint will shut them down.
     
  3. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,526
    2,369
    The bottom looks more of a genuine IR logo?
    You take your chance from China.
    Max.
     
  4. sdowney717

    Thread Starter Member

    Jul 18, 2012
    385
    13
    I do like the look of the second listing, so I bought a 20 piece lot.

    I ran into a problem with my 3000 watt inverter I repaired. It was working good.
    Then I decided to try running the 16k btu heat pump. I figured if it was too much power the inverter would simply shutdown on overload that is what it is supposed to do and used to do when new.
    BUT, it sizzled and burnt every single input side mosfet IRF 3205 I had put into the inverter, all 16 of them. Those were in the first listing.
    Do you think it was the mosfets or is something wrong with the inverter shutdown circuit?

    I also plan to replace all the 16v 3300uf input capacitors to 25v 3300uf.
     
  5. Papabravo

    Expert

    Feb 24, 2006
    10,140
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    It is really hard to answer that question. Forensic electronics at a distance is notoriously difficult. A schematic diagram would help immensely.
     
    Last edited: Apr 22, 2015
  6. kyu9971

    Member

    Mar 28, 2015
    57
    3
    The logo of the second link seems more ' similar to the original.
     
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