What should the hole size be for a leaded through hole component ?
Factors to consider include:
Max lead size.
Min Hole size.
Solder flow through the lead.
Typically the finished hole size should be 8 to 10 mils larger than the maximum lead diameter.
Example:
If the component has a round lead with a diameter of 32 mils:
Then the finished hole diameter should be 32 + 10 = 42 mils.
Note for square and rectangular shaped leads the lead diameter needs to account for the diagonal dimension of the lead.
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