Ipc 7351.pdf Jun 2026

Use IPC-7351 pad dimensions as a starting point, then run a DFM tool (e.g., Valor, Siemens) for your specific fab/assembly house.

The standard calculates the toe, heel, and side solder joint dimensions using the component’s physical dimensions (JEDEC standard) plus manufacturing allowances. Here is the simplified logic: IPC 7351.pdf

Many hobbyist engineers argue, "I’ve made footprints by measuring the component with calipers, and it worked." For a one-off prototype, that is fine. For production, ignorance of IPC-7351 leads to specific, preventable disasters: Use IPC-7351 pad dimensions as a starting point,

The IPC 7351.pdf is a widely used standard in the electronics industry, specifically in the realm of surface mount technology (SMT). Published by the Institute for Printed Circuits (IPC), a leading trade association for the printed board industry, this document provides guidelines for designing and creating land patterns for surface mount components. For production, ignorance of IPC-7351 leads to specific,

To get the most out of the IPC 7351.pdf standard, designers and manufacturers should follow these best practices: