http://www.ieee-pses.org/symposium http://www.emc2004.org/ -------------------------------------------------- I'm not sure this is a meaningful question - as Brian observes the mounting of the equipment or internal construction of the unit always dominates..... My products are used in an environment (motorsport) that has a perisistant 20g <=> 100g rms spectrum, and they always survives major impact shock. e.g Race car crashing and disintegrating at Indianapolis at >230mph. Impact g (multiple times) being beyond what we can measure at >100g. The component technology is nothing special and wide ranging - the mechanics of the overall unit is considered!! What environment are you talking about??
From: Brian O'Connell [mailto:boconn...@t-yuden.com] Sent: 07 June 2004 18:02 To: Gary McInturff; EMC-PSTC (E-mail) Subject: RE: Fragility levels for components. http://www.ieee-pses.org/symposium http://www.emc2004.org/ -------------------------------------------------- Based on HALT and HASS that I've performed, component "fragility" is dependent on its end-use environment (i.e., mechanical characteristics of how the component is installed on the PCB). I suppose that max shock & vibration recommended by the mfr could be used as starting point. But you will never know until you have empirical data, based on the end-use installation. I have seen identical components, that were both mounted on similar-sized PCBs, fail at significantly different g-levels. Adjacent components, PCB material, adjacent trace properties, and other factors can effect the mechanical performance of discretes and ICs. luck, Brian -----Original Message----- From: Gary McInturff [ mailto:gmcintu...@spraycool.com] Sent: Monday, June 07, 2004 8:04 AM To: EMC-PSTC (E-mail) Subject: Fragility levels for components. Does anyone know if there exists a report that generalizes component fragility levels? An 2 cm ball grid array ASIC etc, board mounted? Failure Vibration and shock levels. Thanks Gary ------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. IEEE PSES Main Website: http://www.ieee-pses.org/ To post a message send your e-mail to emc-p...@ieee.org Instructions for use of the list server: http://listserv.ieee.org/listserv/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: emc_p...@symbol.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc ------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. IEEE PSES Main Website: http://www.ieee-pses.org/ To post a message send your e-mail to emc-p...@ieee.org Instructions for use of the list server: http://listserv.ieee.org/listserv/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: emc_p...@symbol.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
