Breakdown is measured per IPC-TM-650 2.5.6.3 and is the failure point of the dielectric material.  Dielectric strength per IPC-T-50 is the maximum working condition where breakdown does not occur over a specified time at conditions (temp/humidity/pressure.) 

Jeffrey McGlaughlin

Engineering Designer
Tactical Systems Aerospace
Office (614)424-7582 Fax (614)458-7582
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-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Michael Strong
Sent: Tuesday, June 25, 2013 12:25 PM
To: [log in to unmask]
Subject: [TN] Dielectric Breakdown vs Dielectric Strength

I was reading through a specification sheet and noticed that both Dielectric
breakdown and Dielectric strength were mentioned.  Both had the same units
(V/mil) but the dielectric breakdown was considerably higher. My questions
are what are the difference between the 2 and how do you measure Dielectric
breakdown? Thanks



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