Typical max voltage for a typical protoboard

Discussion in 'General Electronics Chat' started by jaydnul, Jan 26, 2016.

  1. jaydnul

    Thread Starter Member

    Apr 2, 2015
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    For a typical protoboard like this one
    [​IMG]
    about how high does the voltage need to get across two neighboring pads before they spark across?

    I am afraid of connecting my 20V power supply across two neighboring pads for fear of discharge but I can't find any info on the protoboard's datasheet.

    Thanks
     
  2. tindel

    Active Member

    Sep 16, 2012
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    I wouldn't worry about +/-20 rails. I've never had a problem.
     
  3. wayneh

    Expert

    Sep 9, 2010
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    I agree that 20V is no concern. I'd begin to wonder at maybe 100V or more.
     
    absf likes this.
  4. crutschow

    Expert

    Mar 14, 2008
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  5. wayneh

    Expert

    Sep 9, 2010
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    My boards have a pad spacing of 0.1", and adjacent pads come within ~0.9mm (0.036") of each other (0.036"). According to the reference provided by above by @crutschow, that allows for a voltage difference of >150V, maybe up to 160V or so.

    That's plenty for most stuff but it does tell me that rectified AC at ~170V would not be a good idea. That fits my hunch that getting over 100V warrants looking into the details.
     
  6. jaydnul

    Thread Starter Member

    Apr 2, 2015
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    K cool, thanks everyone!

    Sorry for late reply :)
     
  7. ErnieM

    AAC Fanatic!

    Apr 24, 2011
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    What you are assuming is the voltage is across two adjacent pads.

    If you skip a row you get not 150 V but 300 volt iolation, and you can keep skipping rows till your sleep at night remains undisturbed.
     
  8. wayneh

    Expert

    Sep 9, 2010
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    Yeah, putting even 12V onto two adjacent pads makes me nervous. It's so easy to get a whisker of solder or a bent component lead or whatever. Those don't really seem to happen but I prefer not temp fate.
     
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