Need help finding some more information

Thread Starter

DICEPD

Joined Feb 7, 2011
8
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.



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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
 

wayneh

Joined Sep 9, 2010
16,384
I think that's an NTC thermistor. Dude, the datasheet was the first hit when I Googled NTC 5D-15.
 
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Thread Starter

DICEPD

Joined Feb 7, 2011
8
Well if you know it's bad, why not replace it with the same part? How do you know it's bad?
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 :)
 

Thread Starter

DICEPD

Joined Feb 7, 2011
8
Thanks again,

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

SgtWookie

Joined Jul 17, 2007
22,210
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.
 

Thread Starter

DICEPD

Joined Feb 7, 2011
8
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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