[SI-LIST] Re: breakdown voltage (arching) equation
- From: "Salkow, Steven" <steven.salkow@xxxxxxxx>
- To: gustavo.duenas@xxxxxxxxxxx, si-list@xxxxxxxxxxxxx
- Date: Tue, 04 Nov 2003 10:43:00 -0800
Dear Gus:
http://www.machinist-materials.com/comparison_table_for_plastics.htm
Breakdown is determined by dielectric strength of the material. If it is
air, then also on the airs humidity.
The chart above is a good example of some common materials. As far as
PCB, European specs often refer to creepage distance and clearance
distance ( see
http://www.harkis.harting.com/WebHelp/EHan/WebHelp/GBHANKriechstrecken.h
tm) limits for circuit voltages in terms of minimum required distances
in order to meet these specifications ( Have adequate margins)
Most plastics have a dielectric strength between 300 and 600 volts per
0.001" thickness (1 mil)
Steve Salkow
Lockheed Martin
3200 Zanker Road
San Jose, CA 95134
(408) 473-4058 (san Jose)
(408) 742-4162 (Sunnyvale)
steven.salkow@xxxxxxxx
salkow@xxxxxxxxxxxx
(925) 462-1075 Home
(925-) 487-5946 Cell
(408) 468-7271 Numeric Pager
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx
[mailto:si-list-bounce@xxxxxxxxxxxxx]On Behalf Of
gustavo.duenas@xxxxxxxxxxx
Sent: Tuesday, November 04, 2003 8:03 AM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] breakdown voltage (arching) equation
Hello all ,
Does anyone know of an equation that relates breakdown voltage (arching)
vs
distance in a given dielectric medium, metal types ,etc?
I looked in Henry Ott's book but did not find an equation.
Thanks in advance,
Gus
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