> 
> On August 16th I wrote the following question.  Unfortunately I did not
> receive any responses.  I am sending this again in hopes that the people
> with good comments are still out there in TechNet land.
> 
> This is a request for input on recommended shelf life for SMT components.
> Our company uses small quantities of SMT components but we often purchase
> reels of components which will last for quite some time.  We currently do an
> incoming solderability test and if the components pass we establish a shelf
> based on the manufacturing date of the component.  What I am asking for is
> any advise on what a reasonable shelf life should be for SMT components
> stored in a building with 30 to 60 percent humidity and 72 plus or minus 5
> degrees Fahrenheit.  The components are placed in ESD bags with a piece of
> 3M OAP paper.
> 
> Thanks in advance for any and all comments.


I am presenting a paper and a tutorial at SMI, San Jose, this September,
which addresses solderability and ageing. Your storage conditions sound
fine but whether the components will last depends on their initial
quality.

Christopher Hunt
National Physical Laboratory
United Kingdom TW11 0LW

Tel +44 (0) 181-943 7027 direct or switchboard 0181-977 3222 ext 7027 
Fax: +44 (0)181-943 6453
E-mail:     [log in to unmask]

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