PCB Libraries Forum : SMD vs. PTH Outline and Footprint Name https://www.PCBLibraries.com/forum/ Fri, 01 May 2026 13:28:21 +0000 Wed, 01 Sep 2021 09:15:32 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.07 360 https://www.PCBLibraries.com/forum/RSS_post_feed.asp?TID=2976 <![CDATA[PCB Libraries Forum]]> https://www.PCBLibraries.com/forum/forum_images/PCBLForumLogo.gif https://www.PCBLibraries.com/forum/ <![CDATA[SMD vs. PTH Outline and Footprint Name : It&#039;s because at the time...]]> https://www.PCBLibraries.com/forum/smd-vs-pth-outline-and-footprint-name_topic2976_post11860.html#11860 Author: Jeff.M
Subject: 2976
Posted: 01 Sep 2021 at 9:15am

It's because at the time we created the calculator, most manufacturers only provided Maximum body dimensions for most Through-hole component packages. 

A spot check of data sheets shows this is still the case.

There's also the practical reason to provide a more realistic and consistent graphic representation of the terminal relationships to the body for SMD parts because of tighter sizes and tolerances.

]]> Wed, 01 Sep 2021 09:15:32 +0000 https://www.PCBLibraries.com/forum/smd-vs-pth-outline-and-footprint-name_topic2976_post11860.html#11860 <![CDATA[SMD vs. PTH Outline and Footprint Name : Is there a reason why PTH use...]]> https://www.PCBLibraries.com/forum/smd-vs-pth-outline-and-footprint-name_topic2976_post11859.html#11859 Author: stanleycayochok
Subject: 2976
Posted: 31 Aug 2021 at 8:27pm

Is there a reason why PTH use maximum dimension while SMD uses nominal dimension for outline mapping and footprint naming?

Would it be possible to add an option for PTH to use nominal instead of maximum?
]]> Tue, 31 Aug 2021 20:27:51 +0000 https://www.PCBLibraries.com/forum/smd-vs-pth-outline-and-footprint-name_topic2976_post11859.html#11859