Standard Dimension of SMD Pads
SMD Pad
Given below is the SMD component Pad sizes, whose spacing between pins are normally 25/25.59/50 mils.
The available data are Pin Length(L) and Pin Width(W)
The remaining values are calculated using the formula shown below:
Length of Pad = L
Width of Pad =W
Length of copper = L'
L'= L+ 10mils
Width of copper =W'
W'=W+5mils
Mask Length = L''
L''= L'+ 10mils
Mask Width = W''
W''=W'+8 mils
Tolerance = (+)(-)10%
The available data are Pin Length(L) and Pin Width(W)
The remaining values are calculated using the formula shown below:
Length of Pad = L
Width of Pad =W
Length of copper = L'
L'= L+ 10mils
Width of copper =W'
W'=W+5mils
Mask Length = L''
L''= L'+ 10mils
Mask Width = W''
W''=W'+8 mils
Tolerance = (+)(-)10%