PCB Libraries Forum : SODFL & SOTFL https://www.PCBLibraries.com/forum/ Sun, 05 Apr 2026 14:08:55 +0000 Tue, 26 Nov 2024 11:23:37 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.07 360 https://www.PCBLibraries.com/forum/RSS_post_feed.asp?TID=3244 <![CDATA[PCB Libraries Forum]]> https://www.PCBLibraries.com/forum/forum_images/PCBLForumLogo.gif https://www.PCBLibraries.com/forum/ <![CDATA[SODFL & SOTFL : SOD is Gull Wing leads:SODFL is...]]> https://www.PCBLibraries.com/forum/sodfl-sotfl_topic3244_post13700.html#13700 Author: Tom H
Subject: 3244
Posted: 26 Nov 2024 at 11:23am

SOD is Gull Wing leads: 



SODFL is Flat Leads: 



BTC (Bottom Terminal Component) = QFN, SON, PQFN, PSON, BGA, LGA. CGA, etc.

]]> Tue, 26 Nov 2024 11:23:37 +0000 https://www.PCBLibraries.com/forum/sodfl-sotfl_topic3244_post13700.html#13700 <![CDATA[SODFL & SOTFL : Tom H wrote:It&#039;s the same...]]> https://www.PCBLibraries.com/forum/sodfl-sotfl_topic3244_post13684.html#13684 Author: MGOS
Subject: 3244
Posted: 23 Oct 2024 at 1:39am

Originally posted by Tom H Tom H wrote:

It's the same concept.


Apologies for hijacking this thread, but I'd rather ask here then create a new thread for the same SODFL package type, if that is OK.

I have some difficulties classifying this type of components as to IPC standard (IPC-A-610J, class 3); mainly, is there a definite type to which they belong and I can check during PCB inspection? For instance, based on figures and specs I could classify as:
  • Flat Gull wing leads -> mentions SOD (not SODFL specifically),
  • Flat lug leads -> J version has added an image of LED (Figure 8-140), whilst pin looks similar to SODFL pin or
  • BTC -> whilst image also look similar to SODFL pins (in regards to Figure 8-161)

I know text has precedence to images that is why I am asking this to finally sort this out for me. Thank you for information.
]]> Wed, 23 Oct 2024 01:39:32 +0000 https://www.PCBLibraries.com/forum/sodfl-sotfl_topic3244_post13684.html#13684 <![CDATA[SODFL & SOTFL : Thank you so much Tom! ]]> https://www.PCBLibraries.com/forum/sodfl-sotfl_topic3244_post12898.html#12898 Author: mohamedjubair.k
Subject: 3244
Posted: 05 Mar 2023 at 8:53am

Thank you so much Tom!]]> Sun, 05 Mar 2023 08:53:21 +0000 https://www.PCBLibraries.com/forum/sodfl-sotfl_topic3244_post12898.html#12898 <![CDATA[SODFL & SOTFL : It&#039;s the same concept. You...]]> https://www.PCBLibraries.com/forum/sodfl-sotfl_topic3244_post12897.html#12897 Author: Tom H
Subject: 3244
Posted: 04 Mar 2023 at 9:45am

It's the same concept. You take the "Nominal c" dimension (and round up to the nearest 0.05) and that is your Toe goal. 

Anything bigger than that is a waste of PCB real-estate and excess solder. 

The main strength in the solder joint is under the terminal lead. 


 
]]> Sat, 04 Mar 2023 09:45:08 +0000 https://www.PCBLibraries.com/forum/sodfl-sotfl_topic3244_post12897.html#12897 <![CDATA[SODFL & SOTFL : Hi Tom,Thank you for you quick...]]> https://www.PCBLibraries.com/forum/sodfl-sotfl_topic3244_post12896.html#12896 Author: mohamedjubair.k
Subject: 3244
Posted: 03 Mar 2023 at 6:10pm

Hi Tom,

Thank you for you quick reply. 

Actually I need information about Flat Lead component like attached.
]]> Fri, 03 Mar 2023 18:10:52 +0000 https://www.PCBLibraries.com/forum/sodfl-sotfl_topic3244_post12896.html#12896 <![CDATA[SODFL & SOTFL : Per IPC J-STD-001 Standard, the...]]> https://www.PCBLibraries.com/forum/sodfl-sotfl_topic3244_post12895.html#12895 Author: Tom H
Subject: 3244
Posted: 03 Mar 2023 at 8:59am

Per IPC J-STD-001 Standard, the Toe value is determined by the Terminal Lead Thickness. 

This is the example of the Gull Wing Terminal Lead form.


 

]]> Fri, 03 Mar 2023 08:59:01 +0000 https://www.PCBLibraries.com/forum/sodfl-sotfl_topic3244_post12895.html#12895 <![CDATA[SODFL & SOTFL : Hi Tom,I read the IPC-7351 document...]]> https://www.PCBLibraries.com/forum/sodfl-sotfl_topic3244_post12894.html#12894 Author: mohamedjubair.k
Subject: 3244
Posted: 03 Mar 2023 at 4:13am

Hi Tom,

I read the IPC-7351 document and I did not see solder joint goal table for flat leads [SODFL and SOTFL] components. 

But in library calculator Toe joint value found as 0.20 mm. 

From where did they find this value. Is this 0.20 mm is fine for Toe end.


]]> Fri, 03 Mar 2023 04:13:46 +0000 https://www.PCBLibraries.com/forum/sodfl-sotfl_topic3244_post12894.html#12894