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Thermal relief clearance

bulldog over 16 years ago

I was wondering if anybody knows what the IPC recommended clearance is for a thermal relief around pads. Thanks!

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hcowles over 16 years ago

at the pcbmatrix website http://www.pcbmatrix.com/Downloads/GeneralDocuments.asp
the padstacks document contains the IPC-7251 Padstack Charts (locked).xls that has the recommended padstack parameters for all 3 levels (most, nominal, least) of padstacks
created by PCB Matrix using IPC-2221 IPC-7251 PTH Padstack table for levels A, B, C
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hcowles over 16 years ago

at the pcbmatrix website http://www.pcbmatrix.com/Downloads/GeneralDocuments.asp
the padstacks document contains the IPC-7251 Padstack Charts (locked).xls that has the recommended padstack parameters for all 3 levels (most, nominal, least) of padstacks
created by PCB Matrix using IPC-2221 IPC-7251 PTH Padstack table for levels A, B, C
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