Need help identifying this component

Discussion in 'The Projects Forum' started by 007trains, Aug 17, 2013.

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  1. 007trains

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    May 20, 2011
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    Last edited: Aug 18, 2013
  2. shortbus

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  3. DickCappels

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    It appears that only one component is burnt and the others are just discolored from the burned one outgassing (or burning). My best guess is that its a tantalum capacitor, and using a DVM on the diode test setting, you can test the ones on either side and see if they are diodes.

    Maybe somebody else can decode the value and voltage rating of the capacitor.
     
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  4. 007trains

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    May 20, 2011
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    Thanks for your input. I guess some of the components will need to be removed before they can be tested. I'll get onto it asap and post what I find. Also if anyone can decode the markings it'd be much appreciated.
     
    Last edited: Aug 17, 2013
  5. 007trains

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  6. 007trains

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    Had a look and couldn't match up any form of zener diode code to the numbers "146" written on the case??
     
  7. LDC3

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    Apr 27, 2013
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    You could send the image to ON Semiconductors and ask what they are.
     
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  8. #12

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    That's where I was thinking. ON semi is still in business and they might answer. Meanwhile, you have half a dozen samples that are the same marking and not burnt. Do what tests you can for 2 legged devices, like, "diode? capacitor? zener?".
     
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  9. 007trains

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    May 20, 2011
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    Just emailed them and am currently waiting for reply.
     
  10. 007trains

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    I'm gonna need to learn how to test them and i'll need to pull the board out again before i can test the components but if i don't get a response from ON semiconductors then thats what i'll have to do.
     
  11. KJ6EAD

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    I thought shortbus gave you a precise identification with specifications in his link.
     
  12. THE_RB

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    I use SMD tants a lot in size B/C/D and they look a bit different to that, also I have never seen an ON Semi brand tantalum, I though ON Semi only make semis?

    A SMD cap marked 106 is very common (10uF) but I have never seen the cap value or marked code "146"! These seem to be all over the PCB which seems unusual to have 14uF tant caps everywhere...

    Like you said a meter set to diode test would help a lot, but if we are guessing my vote goes for diode.
     
  13. LDC3

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    Apr 27, 2013
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    The datasheet he provided stated what MK represents for the power zeners, but the other designation (146) has no corresponding representation. For power zeners, the other designation is a 4 place alphanumeric code for location and the date of manufacture.
     
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  14. shortbus

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    The 146 is probably a date or factory code. The link shows a component that looks identical. They use a letter code to give the identification, page #3 of the link breaks it down for you.
     
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  15. 007trains

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    May 20, 2011
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    So how do I determine its size. Would the dimensions of the component help?
     
  16. bertus

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    Apr 5, 2008
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    Hello,

    This thread has been reported for automotive modification.
    This thread has been running to long already.

    I am closing this thread as it violates AAC policy and/or safety issues.

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