Pad Size calculation

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   I'm noticing that Footprint Expert does not take into account the lead thickness of certain devices (example D2PAK/TO-263AB) in the calculations?  Since IPC A-610 uses percentage of solder fillet -to- lead thickness in determining acceptance, wouldn't it be appropriate to incorporate this? 

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gedeakins Members Profile Send Private Message Find Members Posts Add to Buddy List New User Joined: 27 Nov 2013 Location: Conneticut Status: Offline Points: 2	Post Options Post Reply Quote gedeakins Report Post Thanks(0) Quote Reply Topic: Pad Size calculation Posted: 27 Nov 2013 at 9:11am
	I'm noticing that Footprint Expert does not take into account the lead thickness of certain devices (example D2PAK/TO-263AB) in the calculations? Since IPC A-610 uses percentage of solder fillet -to- lead thickness in determining acceptance, wouldn't it be appropriate to incorporate this?



Tom H Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group Joined: 05 Jan 2012 Location: San Diego, CA Status: Offline Points: 6098	Post Options Post Reply Quote Tom H Report Post Thanks(0) Quote Reply Posted: 27 Nov 2013 at 10:46am
	The PCB Library Expert uses rules from IPC-7351 not IPC-A-610. Please present your issue with IPC and let us know what they say. Thanks!
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