Hi Steve- Thanks for the info. That sounds very reasonable, but it would be nice to have more analytical data such as -Which orientation is more susceptible to damage? (seems obvious with the tabs but I'm not certain on the scores) -It seems obvious that smaller parts would be less susceptible, so maybe they can be closer to the edge? Wayne Thayer On Tue, Aug 14, 2018 at 11:49 AM, Vargas, Stephen M < [log in to unmask]> wrote: > Wayne: > > We recommend keeping larger size ceramic style parts at least .200" > from the PCB edge where depanelization is required. For V-Scores, we ask > that a route in the breakaway be added to minimizes the stresses. For > mouse-bites, we like to see the tabs as far as possible from the edge > parts. > > Regards, > Steve Vargas > > Lockheed Martin RMS-Rotary and Mission Systems > Polaris Contract Mfg. > 15 Barnabas Rd > Marion, MA 02738 > 774-553-6192 > [log in to unmask] > > Please consider the environment before printing this e-mail > > -----Original Message----- > From: TechNet <[log in to unmask]> On Behalf Of Wayne Thayer > Sent: Tuesday, August 14, 2018 2:36 PM > To: [log in to unmask] > Subject: EXTERNAL: Re: [TN] MLCC spacing/orientation to V-score or > Perforated Tabs > > That doesn't give me "warm fuzzies"! I have personally seen pizza wheels > result in a broken cap 0.125" away (no visual cue, 10% of parts had the > problem). Leaving a potential reliability issue to each pcb assembly house > is a real problem for me. And not just me, for all of us who use PCBs. I > did find a paper from Kemet which touched on the issue, but not in any > clear, useful guideline kind of way. > > Wayne Thayer > > On Tue, Aug 14, 2018 at 11:03 AM, John Maxwell <[log in to unmask]> wrote: > > > Depend on vendors recommendations for best results > > > > Sent from my iPad > > > > > On Aug 14, 2018, at 1:24 PM, Wayne Thayer <[log in to unmask]> > > wrote: > > > > > > Hi- > > > > > > Is there an IPC standard for distances from components to board edge > > > for the V-score or perforated tab techniques? I've been able to find > > > several recommendations from manufacturers, but I couldn't find the > > > applicable > > IPC > > > doc. > > > > > > Wayne Thayer > > >