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SMD vs. PTH Outline and Footprint Name |
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stanleycayochok 
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Joined: 04 Apr 2016 Status: Offline Points: 23 |
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 Topic: SMD vs. PTH Outline and Footprint NamePosted: 31 Aug 2021 at 8:27pm |
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Is there a reason why PTH use maximum dimension while SMD uses nominal dimension for outline mapping and footprint naming?
Would it be possible to add an option for PTH to use nominal instead of maximum?
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Jeff.M
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Joined: 16 May 2012 Location: San Diego Status: Offline Points: 477 |
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Posted: 01 Sep 2021 at 9:15am |
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It's because at the time we created the calculator, most manufacturers only provided Maximum body dimensions for most Through-hole component packages.
A spot check of data sheets shows this is still the case. There's also the practical reason to provide a more realistic and consistent graphic representation of the terminal relationships to the body for SMD parts because of tighter sizes and tolerances. |
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