PCB Library Expert PTH Reference Calculator

Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic

   Is there a version of this that uses "Proportional Padstack" calculations?

Author	Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic
pholden7 Members Profile Send Private Message Find Members Posts Add to Buddy List New User Joined: 22 Oct 2012 Location: Manchester, UK Status: Offline Points: 3	Post Options Post Reply Quote pholden7 Report Post Thanks(0) Quote Reply Topic: PCB Library Expert PTH Reference Calculator Posted: 03 Jul 2019 at 5:54am
	Is there a version of this that uses "Proportional Padstack" calculations?



Tom H Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group Joined: 05 Jan 2012 Location: San Diego, CA Status: Offline Points: 5719	Post Options Post Reply Quote Tom H Report Post Thanks(0) Quote Reply Posted: 03 Jul 2019 at 7:30am
	The PTH Reference calculator and Library Expert Through-hole calculators use what we refer to as incremental pad stack calculation. The Hole Size is calculated over the maximum Terminal Lead and the pad stack is 1.5 X the Hole Size. A 0.50 mm Hole = 0.75 mm pad size or 0.125 mm annular ring, but the minimum annular ring overrides that. If your minimum annular ring is 0.20 mm then the pad size would be 0.25 mm A 1.00 mm Hole = 1.50 mm pad size or a 0.25 mm annular ring. A 2.00 mm hole = 3.00 mm pad size or a 0.50 mm annular ring. Terminal Leads that create large hole sizes probably carry a lot of current or the package is big and bulky and has weight to support. That is the main reason for the larger Annular Ring. To support the package weight and voltage current. Requires additional solder.
	Stay connected - follow us! X - LinkedIn

Tom H Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group Joined: 05 Jan 2012 Location: San Diego, CA Status: Offline Points: 5719	Post Options Post Reply Quote Tom H Report Post Thanks(0) Quote Reply Posted: 03 Jul 2019 at 7:33am
	In Library Expert Enterprise, the through-hole pad stack settings are in - Preferences > Terminals > Through-hole > Pad to Hole Ratio & Minimum Annular Ring In Library Expert Pro, the through-hole pad stack settings are in the Calculator Panel > Terminal tab.
	Stay connected - follow us! X - LinkedIn