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JEDEC TO-277 Part Type

Printed From: PCB Libraries Forum
Category: PCB Footprint Expert
Forum Name: Questions & Answers
Forum Description: issues and technical support
URL: https://www.PCBLibraries.com/forum/forum_posts.asp?TID=2249
Printed Date: 07 Oct 2024 at 7:25am


Topic: JEDEC TO-277 Part Type
Posted By: ransonjd
Subject: JEDEC TO-277 Part Type
Date Posted: 09 Nov 2017 at 1:38pm
Hi,

Does PCB Libraries automate the creation of JEDEC TO-277 parts? It's not quite a 3-Pin DFN, since the pads stick out beyond the body. I think I have to make it by hand, but I figured I should check to see if I'm missing something.

--John


Replies:
Posted By: ransonjd
Date Posted: 09 Nov 2017 at 1:53pm
I tried using the DFN 3-Pin option, and it mostly worked. The only issue is the 3D model of the pads where they stick out is wrong.

--John

Posted By: Tom H
Date Posted: 09 Nov 2017 at 4:07pm
The JEDEC TO-277 is normally FP Designer footprint but you may trick the 3-Pin DFN by using the Footprint Tab to insert the mfr. recommended pattern data. 

Either way, an accurate 3D STEP model needs to be manually created. 



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Posted By: Tom H
Date Posted: 09 Nov 2017 at 9:20pm
Here is the JEDEC TO-277A STEP file that should also match Vishay - 
http://www.vishay.com/docs/95570/to-277asmpc.pdf " rel="nofollow - https://www.vishay.com/docs/95570/to-277asmpc.pdf 

Download STEP file here:  uploads/3/JEDEC_TO-277A.zip" rel="nofollow - JEDEC_TO-277A.zip

This STEP file is in the Top Plane Rotation Y. 

You can use the Library Expert - Tool Box - to rotate the model to the Z axis (Right Plane). 



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