LM311: Enquiry for part LM311H/NOPB failed DIP test (270112)

Hi Marie,

The leads on this device are not solder dipped finished. What standard are you following for this test?

Hi Ho,

Thanks and will check with customer.

Regards

Hi Marie,

Also, can you request the date and lot codes off the package and packing label (or photos). And possibly a photo of an un-dipped device showing the leads and markings.

These are commercial devices and the leads are SnAgCu plating.

Have they been using these devices in the past? Or first time?

Hi Paul,

Thanks and will check with customer as well.

Regards

Hi Paul,

Please see reply from customer as below.

1.   Can you provide the date and lot codes off the package and packing label (or photos) see photo
2. Possibly a photo of an un-dipped device showing the leads and markings.  see photo

3. These are commercial devices and the leads are SnAgCu plating.  Have you been using these devices in the past? Or first time? à This is 1^st time used for one of new FA under Bentek Family.

Thanks

Hi Marie,

That pic of the packing label is a little blurry, could you tell us the info or get a higher res picture?

Hi Marie,

We do not need another picture of the label - we were able to get the lot information.

We would like a better, close-up picture of the failed device leads. The first picture is a bit blurry.

But what we really need to know is that testing standard are they testing the leads too and what is the failure criteria? The packaging people are interested.

Hi Paul,

Thanks and will check with customer.

Regards

Hi Paul,

Please see the clearer close-up pictures as requested. Thanks. Regards

Hello Marie,

We are not disputing the devices - these are valid date codes.

We are questioning the way the customer is testing the device and what their criteria is for the failure. Is it true corrosion or burnt flux?

We need to see a good, close-up picture of the "failed" device leads - so we can see the "corrosion".

If the customer feels there is a problem, they can start a return process through Mouser.

But I warn you that the RMA people will ask the exact same questions that have still yet to be answered.

Hi Paul,

Thanks for the advice.

Yes, yesterday I have asked the customer again for the close-up picture of the "failed" device leads and the questions you have asked.

Will send to you when received.

Thanks

Regards

Hi Paul,

According to customer,

As highlighted earlier, the part has gone through the dip test (common practice for all old date code parts). From the result posted earlier, the leads showing contamination where it failed our test. We did provide the information earlier in terms of how we conduct the dip test. This should be sufficient information to prove that the part failed.

If customer has provided clearer picture of the defect, will update accordingly.

Thanks

Regards

Hello Marie,

We need to see a detailed photo of the dipped pins.

Are they following any solder dip standard (ISO, JEDEC? MIL?). Or just dipping them in a solder pot?

Are these from a sealed bag? Or open bag?

We need to see if this is normal tarnish or actual corrosion.

Hi Paul,

Thanks for the mail.

We are still waiting for customer's reply.

Will update as soon as receive any from them.

Thanks

Regards

Hi Paul,

Good day!

Sorry I have accidentally muted this case.

Please help to remove mute. Thanks

Customer has responded as follows:

Are they following any solder dip standard (ISO, JEDEC? MIL?). Or just

dipping them in a solder pot?

-Please share with us the standard procedure for ISO, JEDEC? MIL details?

Are these from a sealed bag? Or open bag?

-Sealed bag.

Thanks

Regards 

Hello Marie,

This particular lot was assembled by a subcontractor. That adds another layer to the investigation. I have re-started internal contacts.

At this point, I would prepare the customer to make a return claim through Mouser (I assume you are familiar with the process). Just send a few of the 'Failed" units (2-3) for investigation.

We are not saying that there is something wrong - as this same lot of several thousand units was sent to many other customers with no complaints.

My feeling is that there is a good chance it may be rejected as a cosmetic failure as it was still able to be soldered.