Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


Component Shelf Life

M.Wilmsen

#15390

Component Shelf Life | 17 June, 1998

Is there any industry standards regarding shelf life for components? Also do they very between component type packaging? Thanks

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Dave F

#15391

Re: Component Shelf Life | 17 June, 1998

| Is there any industry standards regarding shelf life for components? Also do they very between component type packaging? | Thanks No, but generally, the shelf life of components depends on the environmental conditions of the storage area. So, in a hot and humid storage area: Boards will absorb more moisture Component leads will develop more corrosion ... than components in a lower temperature/humidity area. Check-out these TECHNet discussions. Dave F

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Yngwie

#21352

Re: Component Shelf Life | 29 August, 2002

What are other testing/process step that we should do if we where to use the old date code QFPs other than solderability and baking ?

What is the plating composition normally %? lead, % tin etc. I have my policy not to accept the more than 12 months old part, but the supplier wants it 18 mnths..what should I do, the problem is this is the sole supplier.

Pls help.

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#21363

Re: Component Shelf Life | 29 August, 2002

This is one reason why I don't like to open old threads.

Anywho. The operative words are �sole source�, eh?

We do not have the luxury of being selective about the date of manufacture of components. We just ecstatic to receive them: * With enough time to complete the build plan. * Without leads that are bent real badly. * With leads that solder. * Bla bla bla

If parts solder well, they�re good.

NORMAL PLATING COMPOSITION => Tough to say. TI used Pd. Ask your supplier.

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Melo_Guy

#21410

Re: Component Shelf Life | 4 September, 2002

You said that you were sole sourced. Are you in need of a second source for crystals or oscillators? My company manufactures these components. send me an e-mail if you are interested.

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#21448

Re: Component Shelf Life | 8 September, 2002

Component distributors now have access to a simple technical packaging which can actually eliminate shelf-life and corrosion without the use of chemicals. Why it's remained such a secret till now is beyond me, but its something I'd like help to spreading the word about.

Static Inetercept is detailed on our websute at http://www.dasalintercept.com You may contact me personally for the techniclal papers

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Yngwie

#21451

Re: Component Shelf Life | 9 September, 2002

I don't know when I can get done with an old datecode material..anyway, thanx for the help guys.

cheers.. zambri

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Essemtec Fox Compact Automatic Pick and Place

Used PCB Equipment - ECM