Morning Steve,
Typically components are offered in different lead lengths to accomodate
differing board thicknesses and target lead protrusion ( flush to max
.060").  Like any other requirement in the standards (-001 & -610), the
approved assembly drawing takes precedence.  In your case, if minimal
electrical spacing at the board assembly and the NHA is not violated, then a
note on the board assembly drawing should be added as such, "maximum lead
protrusion shall be .100" for J1, U1, J3, etc."
As others have advised, there are cutting dies, jigs and fixtures
commercially available that will not degrade the component if performed
prior to component insertion, placement & soldering.
Hope this helps.

Steve Sauer
Mfg Engineer
Xetron Corporation

-----Original Message-----
Subject: [TN] Trimming Leads...


But I can't find any reference that says those are things that you don't
lead clip...

The reason I'm asking is the -610 and J-STD say that for class-3, the leads
are not supposed to be longer than 1.5mm (.0591"). Should leads be clipped
on the kind of components I outlined above if they exceed that?

---------------------------------------------------------------------------------
Technet Mail List provided as a free service by IPC using LISTSERV 1.8d
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL
Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
---------------------------------------------------------------------------------