Hi Scott,

There is also a through hole chart that I found a while back on the PCB Libraries web page. It is called "PCB Libraries Land Pattern Construction" and lists a lead size, a finished hole size and pads for inner, outer, Solder mask, etc. It is entirely in metric, but you can easily convert that if you don't use metric. PCB Libraries web page is a wonderful resource for designers with just TONS of information available there. I very highly recommend it.

Good luck,
Susy

> 
> From: Nick Ban <[log in to unmask]>
> Date: 2008/03/12 Wed AM 07:04:12 CDT
> To: [log in to unmask]
> Subject: Re: [DC] Through-hole component standards
> 
> Hi, Scott. The IPC-7251 is what you're looking for - its currently being
> developed and we're starting to support it in the LP software. Though the
> standard is not finalized yet, it would give you something to work with.
> Here are more details:
> 
> LP Software
> http://www.pcblibraries.com/forum/forum_posts.asp?TID=1998&KW=7251&PID=5809#
> 5809
> 
> 7351 & 7251 (WIP) Naming Convention
> http://www.pcblibraries.com/resources/7351.asp
> 
> 
> Nick
> 
> 
> -----Original Message-----
> From: DesignerCouncil [mailto:[log in to unmask]] On Behalf Of Scott
> Riley
> Sent: Wednesday, March 12, 2008 6:46 AM
> To: [log in to unmask]
> Subject: [DC] Through-hole component standards
> 
> I'm working on a large power board that uses all through-hole parts..lots of
> them.  Is there anything for through-hole parts that would be similar to
> IP-7351 ?  I've searched the IPC standards and PCB Libraries site and
> others, but haven't found much for through-components. 
> 
>  
> 
> I'm using the data sheets, but for the most part they don't have anything
> regarding the recommended PCB hole sizes or mechanical/electrical clearances
> (courtyard). Can anyone point me someplace where I might be able to find
> some additional information ?  
> 
>  
> 
> Scott D. Riley
> Technical Design Service
> 607-658-9322 - Office
> 607-785-1696 - FAX
>  <http://www.techdesignservice.com> www.techdesignservice.com
> 
>  
> 
>  
> 
>  
> 
> 
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