PCB Libraries Forum : DPAK with T-shaped Tab

PCB Libraries Forum : DPAK with T-shaped Tab https://www.PCBLibraries.com/forum/ Tue, 07 Apr 2026 00:18:25 +0000 Fri, 16 Dec 2016 07:28:48 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.07 360 https://www.PCBLibraries.com/forum/RSS_post_feed.asp?TID=2042 <![CDATA[PCB Libraries Forum]]> https://www.PCBLibraries.com/forum/forum_images/PCBLForumLogo.gif https://www.PCBLibraries.com/forum/ <![CDATA[DPAK with T-shaped Tab : All irregular shape pads are done...]]> https://www.PCBLibraries.com/forum/dpak-with-tshaped-tab_topic2042_post8370.html#8370 Author: Tom H
Subject: 2042
Posted: 16 Dec 2016 at 7:28am

All irregular shape pads are done internally at PCB Libraries in PADS Layout and then we add that data to this folder on your computer -

C:\Program Files (x86)\PCB Libraries\Library Expert 2017\Libraries\PADS to CAD

Watch this video of the Tool Box. You only need to watch the first minute.

http://www.pcblibraries.com/products/fpx/userguide/default.asp?ch=12.1

]]> Fri, 16 Dec 2016 07:28:48 +0000 https://www.PCBLibraries.com/forum/dpak-with-tshaped-tab_topic2042_post8370.html#8370 <![CDATA[DPAK with T-shaped Tab : I'm making footprints for...]]> https://www.PCBLibraries.com/forum/dpak-with-tshaped-tab_topic2042_post8369.html#8369 Author: ransonjd
Subject: 2042
Posted: 16 Dec 2016 at 7:23am

I'm making footprints for some JEDEC TO-263 (D2PAK) packages. In a number of the variants, the thermal tab increases in width above the body of the part.

My concern is that if I set E1 to the narrower dimension of the tab, it will solder okay, but the 3D model, courtyard, and outlines will be incorrect.

If I set E1 to the widest extent of the pad, the pad will be swimming in solder and won't self center.

How have other people dealt with this? (I'm currently evaluating PCB Library Expert to see if it's better than the built in functionality of Altium.

I'm hoping for a solution where standard packages don't require hand tweaks.)

--John

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