1. balamanikandan

    Thread Starter New Member

    May 15, 2012
    8
    0
    Hi,

    PCB layout of any SFP+ cage (single port or Multiple ports) shows two or three different hole sizes (Datum A,B and C Holes ).

    What is the importance of the holes ? Do they help in reducing EMI?

    Why are different sizes of holes to be provided?
     
  2. ErnieM

    AAC Fanatic!

    Apr 24, 2011
    7,386
    1,605
    Got a link to the thing you have a question about?

    Generally the mounting holes are to catch various pegs made in the EMI shield, most to make a ground connections, a few just for alignment.
     
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