In addition to Kathy's comment, Yes.  Unless the pcb holes are
**extremely** oversize, you will have a hard time inserting the caps.
Insertion flat to the board will create a lateral stress (shear stress) to
the leads where they are welded/assembled to the cap body, that could/would
cause a failure anywhere from during assembly to some time during the life
of the product.  Can't be good for the plated hole either.
Can you get your customer to compromise, for example, form the leads as
close to the body as possible without placing undue stress on the lead
welds, and applying a Loctite(R) or RTV under the part?  We have used this
in the past with good results.  Looks silly/funny/kludgey, but may just
work.
Otherwise, our sincere condolences.
Roger M. Stoops, C.I.D., PCB Designer
[log in to unmask]


Trimble
Engineering and Construction Division
5475 Kellenburger Rd.
Dayton, OH 45424-1099 USA
Ph: +01 937.233.8921 or +01 937.233.4574 ext 288
Fax: +01 937.233.7511


Andre Leclair <[log in to unmask]>
Sent by: TechNet <[log in to unmask]>


12/12/01 08:25 AM
Please respond to "TechNet E-Mail Forum."

Hi all
I hope this gets some good advice.

I have a customer who is requiring the placement of an electrolitic cap
that has a lead spacing of 0.140" and the PCB has 0.100".  They do not want
the leads formed, they want the part flat to the board.  In doing this, am
I opening myself up to stress induced failures of the component.

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