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Card Edge Vs. Pin Connections

Discussion in 'Electronic Basics' started by Searcher7, Oct 28, 2012.

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  1. Searcher7

    Searcher7 Guest

    I'm working on an electrical project that requires switching between
    40 pin data connections. Does anyone know which would be a more
    reliable connection between a card edge connection and a pin
    connection over time under the same static and environmental

    I assume a pin connection, but need confirmation.


    Darren Harris
    Staten Island, New York.
  2. Guest

    Static? Does that mean one connection cycle?
    I don't think you've defined the problem well enough.
  3. Rich Webb

    Rich Webb Guest

    Card edge connectors are cheap and if you go with gold plated fingers
    and wipers and also engineer enough mechanical support then they're
    probably fine in some applications. You've left a lot of requirements
    unstated, though.

    You can get "pin connectors" that survive harsh environmental conditions
    of temperature, humidity, shock (BIG fscking shock!), and vibration.
    Something like this
    But I'm guessing that's more than you're looking for.

    If that's too much, try Samtec's Tiger Eye series. They have pretty high
    density, discrete wire connectors in several related form factors.
  4. Searcher7

    Searcher7 Guest

    "Static" as in motionless. This is just an in the home set up not involving extreme conditions.

    I was just looking for confirmation that generally speaking pin connections are preferable.


    Darren Harris
    Staten Island, New York.
  5. Guest

    What does "motionless" mean? The boards sit stationary but may be
    plugged and unplugged regularly? Or they're plugged once and never
    touched again? 100 cycles? What voltages/currents? There are many
    variables, here.
    If there were one answer, there would only be one connector. You
    really do have to match the connector to the specific application.
  6. Searcher7

    Searcher7 Guest

    Motionless means that when it is plugged in it will not be moved. The leads sill sit in the case and dismissing an earthquake they will not be subjected to much in the way of vibration or shock. (There will be not pulling stresses at all).

    And the reason I don't just solder the leads as opposed to using connectors is because of the plausibility of having to take it apart and make repairs in the future.

    And as mentioned these will be data connections.

    Darren Harris
    Staten Island, New York.
  7. Guest

    As long as the number of connections isn't huge and you have the
    space, edge connectors will work fine. You should use gold plated
    connections (both connector and PCB fingers) which does cost a little
    bit but it should be much cheaper than a connector set. If you had
    high vibration, many insertion cycles, or high currents, or a nasty
    environment, pins would probably be a better choice.
  8. Searcher7

    Searcher7 Guest

    Thanks a lot.

    Darren Harris
    Staten Island, New York.
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