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Insulated BNC right-angle connector

Discussion in 'Electronic Design' started by Spehro Pefhany, Oct 18, 2013.

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  1. Hi, all:-

    Okay, there are a number of manufacturers of insulated (to the panel)
    R/A BNC connectors that all appear to be compatible.

    Eg. Amphenol 112419
    http://www.amphenolconnex.com/media/downloads/3178/112419.pdf

    (also Molex, TE Connectivity, etc.)

    None of the drawings appears to indicate the electrical connectivity.

    I can see the two pins at the back are the center and shell of the
    BNC, but I don't see any information on the "Mounting Posts" or the
    metal "Board Locks".

    Are they insulated or are they connected to the BNC shell? Anyone know
    for sure?

    Thanks,

    Best regards,
    Spehro Pefhany
     
  2. Uwe Hercksen

    Uwe Hercksen Guest

    Hallo,

    I don't know for sure, but I measured such connectors, the mounting
    posts were isolated to the shell and to each other. But I don't know if
    this is true for all parts from all manufacturers.

    Bye
     
  3. Hi, thanks, Uwe, that's a big help.

    Best regards,


    Best regards,
    Spehro Pefhany
     
  4. Hi, Glenn:-

    If so, I can't find it. JL was looking for some that were
    metal/grounded back in 2005 or so.

    Thanks,


    Best regards,
    Spehro Pefhany
     
  5. Hi,

    I'm actually probably going for a TE part with solid pins. Looks like
    they're generally isolated. I'll order a few up for early next week,
    but this is enough data points to provisionally assume they're
    isolated.

    Thanks!


    Best regards,
    Spehro Pefhany
     
  6. Hi Spehro,

    I had hit reply then went checking some data in my archive to provide an
    authoritive answer and see you already have one. The three makes I have
    dealt with all the mounting pins were isolated from the body and the body
    could pass through a metal panel and remain isolated. Amphenol happened to
    be one of thoise makes.

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  7. Guest

    You can look at the drawings here http://www.digikey.com/product-highlights/us/en/amphenol-bnc-isolated-pcb-receptacles/3749

    They explicitly label the back pins G and S and the body pins are unlabeled, meaning they're only for mechanical support and are not connected to anything.
     
  8. Uwe Hercksen

    Uwe Hercksen Guest

    Hello,

    but in datasheets of ICs we find pins labeled with NC (not connected)
    and DNC (do not connect!), a better statement than just unlabeled pins.

    Bye
     
  9. Use a Paxolin panel and put a big tag-washer under each connector nut?
     
  10. On Fri, 18 Oct 2013 07:03:54 -0700 (PDT),
    I think so, but that's not all that convincing in itself. If you look
    at this drawing of a non-isolated version:

    http://drawings.amphenolrf.com/Customer_Outline/C031-5640-1010.pdf

    They don't label the body pins either, but it's an all-metal
    construction so they're no doubt grounded.

    See photo (bottom view):
    http://sigma.octopart.com/8535373/image/Amphenol-31-5640-1010.jpg


    The connector guys tend to do the same thing with things like barrel
    connectors. It's supposed to be obvious or something which terminals
    go to what part of the switch/connector.
     
  11. Use a Paxolin panel and put a big tag-washer under each connector nut?[/QUOTE]

    The thread is plastic, so the panel isn't the issue. It's the mounting
    pins.
     
  12. Guest

    Maybe but they don't have accompanying notes like "Fork Pin holds connectors rigidly to P.C. Board for high temperature and mass production assembly"
     
  13. Guest

    Right, they don't seem to care about the connection there. One thing is clear and that is if you expect to maintain the connector return loss specification out to the rated frequency, then your board has to terminate the G/S connection with the characteristic impedance in lumped component, stripline, microstrip or whatever you're using. If it's a new layout, just use isolated solder pads for the shell pins on the isolated connectors.
     
  14. We use a version of this, not sure if its the same one. It does have
    pins, not the splayed pins in detail A.
    I will check on monday if they are isolated.

    Cheers
     
  15. Nico Coesel

    Nico Coesel Guest

    The ones I've used & seen so far are all insulated.
     
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