I can't speak for the J-std or A-610 specs, but the Class 3A requirements in
the IPC-6012 spec did change with the release of the "Space Addendum".
IPC-6012C had a section for Class 3/A requirements - this was dropped in the
6012D release and those requirements now appear to be contained in 6012DS
(Space addendum).

The "A" in Class 3/A most definitely does not refer to the A/B/C
producibility levels outlined in the IPC-222x design series!

Morgan Viggers
Field Applications Engineer
ISU Petasys
503.675.3877

-----Original Message-----
From: Jenkins, Jeffrey (US) [mailto:[log in to unmask]] 
Sent: Thursday, June 11, 2020 10:58 AM
To: [log in to unmask]
Subject: [TN] IPC class 3A?

Good Morning folks,

I have a question that was posed to me recently.  I vaguely recall that
there used to be a class 3A for aerospace, probably for the J-std-001 and
perhaps IPC-A-610.  After a bit of searching, I'm not finding anything on
class 3A.  So I'm wondering, has that been superseded by the Space Addendum?

I had one person indicate they believe the "A" stood for the Producibility
level, but I hadn't hear that before and don't believe that there is a
direct colleration.  I hope I'm not mistaking.

Thank you for any assistance in clarification that you may be able to
provide.

Best,


Jeffrey A. Jenkins, CID+
Principal Engineering Designer
Cubic Mission Systems




This message has been marked as Public on 6/11/2020 10:57 AM.