3.2.3. Pads

• Always add all pads of Packages, even those which are not always connected. For example, the package “TO220” has a metal tab, so you should define it as a pad, no matter if it’s often not connected (and even not connectable when mounted vertically).

• Use pad names according IPC-7351 (if applicable). For Packages which are not covered by IPC-7351:

  • If the function of a pad is absolutely clear, choose its abbreviated functionality as name (e.g. “A” for anode and “C” for cathode).

  • Otherwise just use numbers starting with “1” at top left and increment them counterclockwise.