General > General Technical Chat

DIGIKEY sold me 8 Years Old electrolytic caps?!?

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ColdPower:
Right, apparently you need explanation, and thanks for offending me!

1. No, I didn't buy them at good price, compared to current production, quite the opposite.
2. In my dictionary obsolete doesn't mean past expiration date
3. I've been trying to contact DK live chat all morning with no luck, will post once I hear from them
4. How is asking if a company did the right thing trashing? You have a really sick understanding of the world, which I'm sorry, but doesn't make right your behaviour to others.
5. No, shockingly I'm not looking for freebies through eevblog's forum.

Apologies for the off-topic to everyone that's here to actually help, especially to Jay_Diddy_B for providing the key info on this topic, which the above person failed to read as it seems.

thermistor-guy:

--- Quote from: ColdPower on December 21, 2020, 01:51:08 pm ---
--- Quote from: exe on December 21, 2020, 01:21:50 pm ---Can you please post pictures and tell how you calculated their age?

--- End quote ---

By Digi-key's own repack label, dated 2013. I'll try decipher the date codes as well.

--- End quote ---

I am surprised you received stock this old. This is a question for Digi-Key: can they explain why your parts date back to 2013.

In manufacturing and distribution, First-In-First-Out handling of inventory is a big deal, and normally it's strictly enforced. No system is perfect -
old stock, can, incorrectly, get stranded in the warehouse, while newer stock (of the same item) continues to ship as normal. Stocktakes usually pick
this up, but not always.

An example of what can happen (not saying it did happen here). Supplier orders a 3000-piece reel, but gets a 5000-piece reel. Supplier sells 3000 qty
in multiple cut-tape orders. Inventory system then shows zero stock. Part is marked obsolete, so no more orders. Partial reel of qty=2000 sits there
until next stocktake. Stocktake detects the partial reel, puts it aside in a discrepancy/quarantine bin. Eventually staff investigate the discrepancy.
Reel looks ok, so back it goes into a normal bin, with inventory count adjusted to 2000. Parts are now a few years old (but not eight) and
available for sale.

Another example (again, not saying it did happen). Reel goes missing: misplaced in another bin, barcode on reel doesn't read properly so reel stays
misplaced for a while. Inventory manually adjusted to zero. Part obsolete, no more orders. Reel eventually recognized as misplaced. Staff return it to
the correct bin and readjust inventory count. Parts are now a few years old and available for sale.

Apart from shelf life of electrolytics, there is the question of solderability - will the leads of the old parts solder properly, without a lot of manual touch-up?
I once worked for an OEM that would reject old parts for production, simply over that issue. It's worth asking Digi_Key about the 2013 date, if only
because of solderability concerns.

ColdPower:
Thank you for your input, that really makes a lot of sense and your point of solderability is another possible concern especially if storage conditions were not optimal, but I believe DK does what's needed for that. This case really is probably an extreme example, as caps apparently date as back as 2011 and point here isn't trashing DK (I love DK, it has always been my preferred supplier and I often have paid over the odds just to buy from them!), but checking if anyone else has noticed the same  - is it an isolated case or is there a problem with stock control. If someone had a delivery recently, could you check and share? I just got few other caps delivered (NOT obsolete, as this seem to justify it for some people!) which were just over two and a half years old, which isn't a shockingly lot, but as it appears, still well past the Panasonic's 12 month expiration date.

So if you ordered caps recently, please have a look and share what you have.

exe:
I'd expect discounts on such products. I like buying parts that marked on tme "until stock lasts" as usually it means a good deal. Although sometimes it goes not very smooth. Like, I wanted to buy some cheap obsolete polymer caps, they had only 9 left in stock, but minimum purchase quantity was 10. It took me a lot of time back and forth with support to resolve it. So, I saved maybe 10 or 20 euros on caps, but spent hours :).

wraper:

--- Quote from: exe on December 22, 2020, 01:25:58 pm ---I'd expect discounts on such products. I like buying parts that marked on tme "until stock lasts" as usually it means a good deal. Although sometimes it goes not very smooth. Like, I wanted to buy some cheap obsolete polymer caps, they had only 9 left in stock, but minimum purchase quantity was 10. It took me a lot of time back and forth with support to resolve it. So, I saved maybe 10 or 20 euros on caps, but spent hours :).

--- End quote ---
Most distros charge only for quantity dispatched, so you can by 10. Remaining 1 will never arrive and you won't be charged for it. TME charges full amount right away, maybe when they realize they cannot order them, they will simply make a refund.

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