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SODFL & SOTFL |
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mohamedjubair.k 
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 Topic: SODFL & SOTFLPosted: 03 Mar 2023 at 4:13am |
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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.  |
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Tom H
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Joined: 05 Jan 2012 Location: San Diego, CA Status: Offline Points: 5716 |
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Posted: 03 Mar 2023 at 8:59am |
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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.
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mohamedjubair.k
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Posted: 03 Mar 2023 at 6:10pm |
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Hi Tom,
Thank you for you quick reply. Actually I need information about Flat Lead component like attached.  |
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Tom H
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Posted: 04 Mar 2023 at 9:45am |
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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.  |
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mohamedjubair.k
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Posted: 05 Mar 2023 at 8:53am |
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Thank you so much Tom!
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