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ISO1540DR and ISO7221CDR Soldering Issue

Expert 3030 points

Replies: 3

Views: 154

Part Number: ISO1540


We have a customer who bought a reel of ISO1540DR and  ISO7221CDR from Mouser, but he found that the footprint is dull-red and  there is little Sn of the footprint  caused inconvenience of soldering. So the customer need to confirm if there is special process of the soldering, is it normal ?

Best regards


  • Hi Kailyn,

    I double-checked the packaging sections of both the ISO1540 (page 28) and ISO7221 (page 30, 31)- we do not expect Sn to present at all in the leads. Both parts have a Cu NiPdAu finish on the leads. There are no special soldering steps required for these parts.

    Can you send us a couple of pictures of this and lot trace codes please? I'll have my team look into this and follow-up with you.


  • In reply to Abhi Aarey:

    Hi Kailyn,

    As Abhi requested, please let us know if you were able to gather the pictures of devices with the observations that customer seen and the lot trace codes so that we can get this double checked with the quality team. Thanks.

    Koteshwar Rao
  • In reply to Koteshwar Rao:

    Hi Kailyn,

    We haven't heard from you in over a week. We would be happy to support you further but we will need more information. For now, I'm going to close this thread and mark it as resolved.

    Please either reply to this thread to re-open it (and click this did not resolve my issue) if you have more information or start a new thread (in the event that this thread locks by the time you get more information).

    Best regards,