Leaded Horizontal TO-220 Pad Association

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   I am currently trying to build a TO-220 leaded transistor in PCB Libraries. All goes fine with the creation within the tool graphically, but when I import it into my PADS library (ver 9.3.1 if relevant) the 4 th pin does not have the large thermal pad associated to the hole (see image).

I also noticed that graphically the large pad shows as expected (see image).  
However if I open the padstack viewer only the underlying hole is displayed there as well.

And as for the version I am on 2012.47

In any case I will add them directly to this post anyway.

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caclark Members Profile Send Private Message Find Members Posts Add to Buddy List Advanced User Joined: 24 Oct 2012 Location: Cincinnati, OH Status: Offline Points: 177	Post Options Post Reply Quote caclark Report Post Thanks(0) Quote Reply Topic: Leaded Horizontal TO-220 Pad Association Posted: 20 Mar 2013 at 11:46am
	I am currently trying to build a TO-220 leaded transistor in PCB Libraries. All goes fine with the creation within the tool graphically, but when I import it into my PADS library (ver 9.3.1 if relevant) the 4 th pin does not have the large thermal pad associated to the hole (see image). I also noticed that graphically the large pad shows as expected (see image). However if I open the padstack viewer only the underlying hole is displayed there as well. And as for the version I am on 2012.47 In any case I will add them directly to this post anyway.



rdl86626 Members Profile Send Private Message Find Members Posts Add to Buddy List Advanced User Joined: 20 Jul 2012 Location: Hollister, CA Status: Offline Points: 83	Post Options Post Reply Quote rdl86626 Report Post Thanks(0) Quote Reply Posted: 08 May 2013 at 12:17pm
	I was also building a TO-220FP footprint, horizontal. I put the numbers in, saved it to my library, clicked on it again and it turns vertical with all the wrong dimensions, h was 16.4 now says it is 3.6. I output it to OrCAD PCB Editor and it comes out ok. Also I don't understand what the b dimension is. Is it the thickness of the terminal? I am using 0.51 version. A little confused. Rick