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Is this a diode?

Discussion in 'General Electronics Discussion' started by 1-3-2-4, May 16, 2013.

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  1. 1-3-2-4

    1-3-2-4

    53
    0
    May 7, 2010
    It's reading 0V in each direction but on the underside of it is a ceramic resistor.

    *edit seems so, I had to lift one side to get a better reading.
     

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    Last edited: May 16, 2013
  2. CocaCola

    CocaCola

    3,635
    5
    Apr 7, 2012
    Yes, an RS1B diode...
     
  3. davenn

    davenn Moderator

    13,833
    1,950
    Sep 5, 2009
    0V in each direction ? ... how and what are you measuring it with ??

    Dave
     
  4. 1-3-2-4

    1-3-2-4

    53
    0
    May 7, 2010
    I was in diode test with my meter and like I said once I lifted up one end I was able to get it tested, it's in with a resistor so that's why.
     
  5. Rleo6965

    Rleo6965

    585
    9
    Jan 22, 2012
    It's more accurate if you lift the diode from pcb before doing the diode test. Reading of 0.7V in 1 direction and OL in another direction means diode was ok.. Reading of 0v means shorted diode.:)
     
  6. 1-3-2-4

    1-3-2-4

    53
    0
    May 7, 2010
    :) thanks, I should of known better
     
  7. KrisBlueNZ

    KrisBlueNZ Sadly passed away in 2015

    8,393
    1,271
    Nov 28, 2011
    No it isn't. If the diode only has two pins (some SMT ones have three), lifting one end is enough. Obviously you don't measure it while the PCB is powered... Having one end connected to the PCB makes no difference, as long as your multimeter is isolated.
     
  8. 1-3-2-4

    1-3-2-4

    53
    0
    May 7, 2010
    yep that's pretty much known
     
  9. 1-3-2-4

    1-3-2-4

    53
    0
    May 7, 2010
    Leaving it in place caused it not to read right.
     
  10. Rleo6965

    Rleo6965

    585
    9
    Jan 22, 2012
    Lifting 1 side of smd diode require you to apply soldering iron on both side of component to melt the lead. So that smd 1 side can be lift up. But Its hard to test with small smd component specially when some contact was under the component.
    I rather remove the component since I already melted both side of smd.:)
     
    Last edited: May 17, 2013
  11. KrisBlueNZ

    KrisBlueNZ Sadly passed away in 2015

    8,393
    1,271
    Nov 28, 2011
    That diode looks like it has has a J-shaped connection at each end, like an SMT Tantalum. When you melt the solder on one end, the whole component can be tilted without affecting the other end because the thin metal at the other end just flexes.
    Even if that was relevant, it's not the same as
     
  12. garyson0

    garyson0

    7
    0
    Jun 5, 2013
    Fast Recover Rectifier Diode RS1B.
     
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