There are a lot of formulas and graphs to help (see IPC-2221), but real crude I'll say the following:

·         500 volts at sea level, 25°C spacing for spheres is .0026"; points require .011".

·         500 volts at 8000 feet, 45°C spacing for spheres is .0046"; points require .0169".



Dewey







-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Kuczynski, Michael
Sent: Thursday, September 26, 2013 10:00 AM
To: [log in to unmask]
Subject: [TN] Component Spacing and High Altitude



All - I'm looking for some input regarding component spacing requirements at high altitudes (2,300 M/7,500 ft).



I know there are MANY other factors when considering designing for high altitude; pcb material, power supply, components, application, etc.



In our case, our medical analysis unit/devices will be on the ground, but possibly in high altitude, remote locations.



Any and all suggestions are welcome.



Thank You All for your insight and time.



SIEMENS

Michael Kuczynski     Healthcare Diagnostics Inc.

Product Eng. II CID     511 Benedict Ave.

914-524-3118 (Ph)       Tarrytown, NY 10591

914-524-3322 (Fax)      Mail Stop P25-1-C

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