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Compliance logo?

Discussion in 'Misc Electronics' started by N_Cook, Jan 5, 2011.

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  1. N_Cook

    N_Cook Guest

    Anyone recognise and know meaning of the logo on a pcb overlay, USA 2007
    date, the one next to the RU logo (included to show orientation). Maybe pcb
    makers logo but usually a string of compliance logos seen at that posistion
    on pcb overlays.
    For those queezy about such things , you will need to engage script blocker
    for this hosting site
    http://diverse.4mg.com/compl_logo1.jpg
     
  2. I don't recognise it but it will be the blank pcb manufacturers logo
    and it will be registered with UL.

    Often there will be a number starting with E as well which is the UL
    file number. You can look this up on the UL website.
     
  3. N_Cook

    N_Cook Guest


    Thanks for that, there is an E...... number there, I'll look up
     
  4. Check it here:

    http://database.ul.com/cgi-bin/XYV/template/LISEXT/1FRAME/index.htm

    It will give you full details of their UL approvals. For example they
    may be certified for double sided but not multilayer.

    It will give you the company name and location as well.
     
  5. N_Cook

    N_Cook Guest

    So from the E number
    RUIHUA PRINTED CIRCUIT BOARD CO
    FUZHOU, FUJIAN, CHINA
    and under that number on this pcb is from the UL info the pcb sub-class type

    I was hoping the symbol was for indicating that it was suitable for PbF
    solder use but is probably the logo for that company, although I've not
    found a company site with logo on it

    They make 23 subclasses of board
    involving 3 solder limit types

    260 degree ,10 second
    270, 10
    288, 8
    This board for the 270 /10 type - would that indicate for PbF use or would
    that more likely be the 288 degree type one?
     
  6. Yea, that’s the Company Logo.
    Standard practice for a UL certified product is to have the MFG Name or
    logo, UL file number, and mfg date etched in either the top or bottom
    layer of all the boards in the product.
    You may even see 94-V0 (flame rating for FR4) some where there too.

    As for PBF, there are a few plating choices. Lead Free HASL, Immersion
    Tin , Immersion silver, ENIG, and Gold plate ( over nickel)
    Sunstone has a nice comparison list.
    <http://www.sunstone.com/pcb-capabilities/lead-free-rohs/material-comparison.aspx>

    Cheers
     
  7. N_Cook

    N_Cook Guest


    All I've found so far on temp-dwell time comparison and PbF is
    http://www.pcbdesignschool.com/tag/t260/
    comparing T260 and T288 but cannot find differentiation between 288-8 and
    270-10
     
  8. N_Cook

    N_Cook Guest

    I'm thinking the 270 deg C - 10 sec criteria is more demanding than the 288
    dec C/8 sec dwell ,as more heat in joules is involved, rather than the
    higher temperature
     
  9. You must be looking at the wrong side of the board.

    http://www.inertech.com/images/Ul_logo.gif

    ....and it indicates a "UL Recognized Component".



    Best regards,
    Spehro Pefhany
     
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