Through Hole Clearances
Through Hole Clearances
(OP)
Where could I look for the PCB through hole diameter vs lead size?
is there an IPC standard? I have searched a couple with nothing regarding this topic. Closest I've seen was land sizing
is there an IPC standard? I have searched a couple with nothing regarding this topic. Closest I've seen was land sizing





RE: Through Hole Clearances
You just look at your lead diameters and add a few mil, about 5 for plate thru error, and about 5-8 for solderablility. Then you try to reduce the number of drill sizes used by re-using a larger already required size for various smaller leads as long as you don't go way over.
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: Through Hole Clearances
Dan - Owner

http://www.Hi-TecDesigns.com
RE: Through Hole Clearances
RE: Through Hole Clearances
RE: Through Hole Clearances
RE: Through Hole Clearances
RE: Through Hole Clearances
Suggested hole parameters may also be different when the substrate is a CEM1 or PC-75 'appliance type' material where the holes are usually punched rather than drilled.