Pdf __exclusive__: Ipc-7351c

: Replaces the old 3-tier system (Most, Nominal, Least) with pad sizes that scale proportionally to the component lead dimensions. Rounded Rectangles

Most PDFs you find will show you the pad dimensions. The deep text explains : ipc-7351c pdf

IPC-7351 utilizes three "Density Levels" to help designers balance board space with manufacturing ease: : Replaces the old 3-tier system (Most, Nominal,

IPC-7351C is a standard published by the Association Connecting Electronics Industries (IPC). It specifically addresses the requirements for (also known as footprints or pads) on printed boards for surface mount components. ipc-7351c pdf