Purpose of pouch, digikey

Discussion in 'General Electronics Chat' started by aamirali, Aug 4, 2014.

  1. aamirali

    Thread Starter Member

    Feb 2, 2012
    415
    1
    I have got some components from digikey. Along with the components there is small pouch. What is this.
     
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  2. mitko89

    Member

    Sep 20, 2012
    123
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    According to the quoted standard (http://www.jedec.org/sites/default/files/docs/jstd033b01.pdf), those cards would indicated whenever your parts were exposed to humidity. If the indicator shows pink, you should dry the package before using the enclosed materials. Or at least that is what I understood from the brief skimming of the document I linked.
     
  3. Alec_t

    AAC Fanatic!

    Sep 17, 2013
    5,801
    1,105
    Perhaps the pouch contains dessicant?
     
  4. ronv

    AAC Fanatic!

    Nov 12, 2008
    3,292
    1,255
    The pouch is desicant. It absorbs moisture to keep the parts dry.
     
  5. MrAl

    Well-Known Member

    Jun 17, 2014
    2,438
    492
    Hi,

    The pouch keeps the contents dry, while the card indicates when the humidity is within the recommended range for soldering. If outside that range, dont solder.

    Some of these parts are also time sensitive, in that once exposed to free air (package is opened) they should be soldered within a given recommended time period (like 6 weeks) for optimum results.
     
  6. MrChips

    Moderator

    Oct 2, 2009
    12,447
    3,363
    I save all the little pouches of desiccant. You can rejuvenate them by putting them in the oven.
     
  7. MrSmoofy

    Member

    Jul 28, 2014
    112
    5
    Don't let kids/pets play with/eat the content of the pouches either.
     
  8. bombledmonk

    New Member

    Nov 17, 2006
    3
    0
    The Moisture Sensitivity Level (MSL) procedures are generally for going through a reflow soldering process. For non-production hand-soldered items a person can normally ignore that precaution.
     
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