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Discussion in 'Datasheets, Manuals and Component Identification' started by Klb10a, Jul 30, 2012.

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  1. Jul 30, 2012 #1
    Klb10a

    Klb10a

    2
    0
    Jul 30, 2012
    Hello, I'm working on a Hamamatsu Photomultiplier Tube Base and came across a diode I'm not familiar with. The inside is orange with a blue band and the only labeling I can see on it is a 5.
     

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    Last edited: Jul 30, 2012
  2. Jul 30, 2012 #2
    GreenGiant

    GreenGiant

    830
    6
    Feb 9, 2012
    as far as I can tell it is a high voltage, low current fast switching rectifier

    not sure exactly which one you would need but here is the datasheet for the replacement.

    I would start lower voltage and work your way up if you have no idea what the voltage would be, better to blow a couple diodes then blow the whole thing
     
    Last edited: Jul 30, 2012
  3. Jul 30, 2012 #3
    Klb10a

    Klb10a

    2
    0
    Jul 30, 2012
    Oh wow, I was misreading the labeling, this whole time I've been searching 14B, however its just an oddly shaped 148, once i googled with the 148 and colors I found out that it is a 1N4148 diode, a very fast switching diode. Thanks though for the replacement part as I think I've narrowed the problem down to this diode!
     
  4. Jul 30, 2012 #4
    GreenGiant

    GreenGiant

    830
    6
    Feb 9, 2012
    Fair enough, good luck
     
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