Need help finding some more information

Discussion in 'The Projects Forum' started by DICEPD, Feb 13, 2011.

  1. DICEPD

    Thread Starter New Member

    Feb 7, 2011
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    Coming from this thread:
    http://forum.allaboutcircuits.com/showthread.php?t=49599

    I purchased another identical power supply and was able to figure out what part it was that went bad for sure:

    NTC NTC1 5D-15, google finds zero information on this, nor could I find any relative information on the component. Radioshack offered no help, nor did the manufacture. We have local electronics repair shop but they were closed.

    [​IMG]

    Uploaded with ImageShack.us

    Is there any other place I could look for information? I know its used as a inrush limiting application, I run the power supply on 115v and it outputs 13.5v/30amps.

    Dan
     
  2. wayneh

    Expert

    Sep 9, 2010
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    I think that's an NTC thermistor. Dude, the datasheet was the first hit when I Googled NTC 5D-15.
     
    Last edited: Feb 13, 2011
  3. DICEPD

    Thread Starter New Member

    Feb 7, 2011
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    Yeah I understand that but not exactly sure what to replace it with or where to even start.
     
  4. wayneh

    Expert

    Sep 9, 2010
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    Well if you know it's bad, why not replace it with the same part? How do you know it's bad?

    See http://www.sunrom.com/files/3487.pdf
     
  5. DICEPD

    Thread Starter New Member

    Feb 7, 2011
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    That is the good power supply, I have an identical one that the NTC was turned to dust. I am unable to find anything online to purchase a replacement, thats why I was asking here :)
     
  6. thatoneguy

    AAC Fanatic!

    Feb 19, 2009
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  7. DICEPD

    Thread Starter New Member

    Feb 7, 2011
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    Awesome! Thanks, I not sure what any of those values mean, but its a great start :p
     
  8. DICEPD

    Thread Starter New Member

    Feb 7, 2011
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    Thanks again,

    Was able to cross-reference it to Digikey.com! Although they were 2 bucks a piece it probably saved me a bit :)
     
  9. SgtWookie

    Expert

    Jul 17, 2007
    22,182
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    You may find that a new one will also blow immediately. That could be caused by (a) capacitor(s) going bad (shorted) or a MOSFET or switching transistor shorted out., or a reverse-ESR protection diode being shorted.

    You might consider wiring a 6A fuse in series with it temporarily while you're testing it.
     
  10. DICEPD

    Thread Starter New Member

    Feb 7, 2011
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    0
    I bought a few of them. That might be the case as well, but figured this is where I would start.

    I had some thermistors that I had put in, which worked until I turned the load up. It would run about 3-4 amps of lights, fans, aux things.

    I found the manual online said to not turn it on,off, and back on quickly when its been running a while, because it can destroy that particular component. Thats what I hope happened because thats exactly what I did :p I wasn't aware that would happen then lol
     
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