Hi Lonzen:
This is known in the industry as clearance and creapage.
Although there are IPC charts and standards, these may or may not meet other
industry requirements such as UL labs or CE.
Carlos
On Tue, May 26, 2009 at 8:58 AM, Jack Olson <[log in to unmask]> wrote:
> Sorry you had to wait 8 days to get a response,
> but I got caught up in a rolling layoff...
> (Is there anyone else here anymore?)
>
> According to IPC-2221 Table 6-1, for 400V
> you need at least 0.25mm between tracks
> on internal layers.
> Layer to layer spacing is not as easy to answer.
> I tried to get a discussion going last year about
> z-axis voltage and what line 5 means on the
> IPC-4101 slash sheets (different base materials),
> but there were no useful responses.
> IPC-2221 is being revised, but according to the
> last draft I scanned it will say 800-1000 volts/mil
> in the z-axis in paragraph 6.1.1
>
> You should get IPC-2221& IPC-2222 if you don't
> have them
>
> Jack
>
>
> .
> On Mon, May 18, 2009 at 12:05 PM, Lonzen M. Barcelos <
> [log in to unmask]> wrote:
>
>>
>> Hi!!
>>
>>
>> I am working in a project with Multilayer PCB, and I have some
>> concerns about the insulation among the layers and the level of voltage
>> between tracks.
>>
>> Well, my project has a voltage of 400V/5A in some internal tracks
>> in the board and between layers, and my concern is:
>>
>> The insulation of prepreg is good enough to isolate the
>> tracks with this level voltage? What is the maximum level voltage can I
>> pass in an internal track? Anyone knows some reference with this subject?
>> (IPC, IEC.....). I want to know if is usual to put internal tracks with this
>> level of voltage, and if it is reliable?
>>
>> Sorry for the several questions, but these are important to me.
>>
>> Best regards
>> *Lonzen M. Barcelos*
>> Household Refrigeration
>> EECON - Embraco Electronic Controls
>> ------------------------------
>>
>>
>> -------------------------------------------------------------------------------
>> DesignerCouncil Mail List provided as a service by IPC using LISTSERV 1.8e
>> To unsubscribe, send a message to [log in to unmask] with following text in
>> the BODY (NOT the subject field):
>> SIGNOFF DesignerCouncil
>> To temporarily stop/(start) delivery of DesignerCouncil for vacation
>> breaks send: SET DesignerCouncil NOMAIL/(MAIL)
>> Search previous postings at: http://listserv.ipc.org/archives
>> Please visit IPC web site
>> http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional
>> information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100
>> ext. 2815
>>
>> -------------------------------------------------------------------------------
>>
>>
>
> -------------------------------------------------------------------------------
> DesignerCouncil Mail List provided as a service by IPC using LISTSERV 1.8e
> To unsubscribe, send a message to [log in to unmask] with following text in
> the BODY (NOT the subject field):
> SIGNOFF DesignerCouncil
> To temporarily stop/(start) delivery of DesignerCouncil for vacation breaks
> send: SET DesignerCouncil NOMAIL/(MAIL)
> Search previous postings at: http://listserv.ipc.org/archives
> Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16for additional information, or contact Keach Sasamori at
> [log in to unmask] or 847-615-7100 ext. 2815
>
> -------------------------------------------------------------------------------
>
---------------------------------------------------------------------------------
DesignerCouncil Mail List provided as a free service by IPC using LISTSERV 1.8d
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF DesignerCouncil.
To temporarily stop/(restart) delivery of DesignerCouncil send: SET DesignerCouncil NOMAIL/(MAIL)
Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
---------------------------------------------------------------------------------
|
