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TO-220 (Through-Hole) Staggered Pads significant?

Printed From: PCB Libraries Forum
Category: PCB Footprint Expert
Forum Name: Questions & Answers
Forum Description: issues and technical support
URL: https://www.PCBLibraries.com/forum/forum_posts.asp?TID=3530
Printed Date: 09 Sep 2025 at 8:29am


Topic: TO-220 (Through-Hole) Staggered Pads significant?
Posted By: Alex Quilty
Subject: TO-220 (Through-Hole) Staggered Pads significant?
Date Posted: 08 Sep 2025 at 9:40am
Does it matter that the TO-220 Pads are staggered or in a row (assuming that the pads allow for proper clearance w/ no slivers)? 

When should I use the staggered pads and when should I use the aligned row of pads if they are significant?



Replies:
Posted By: Tom H
Date Posted: 08 Sep 2025 at 11:38am
The only time you need to spread the terminal leads is -
  1. When the pin pitch is small and the pads violate the minimum pad to pad spacing
  2. When the component manufacturer's package comes with pre-bent leads
Otherwise, it's best to have the pads line up. 

The 'D' and 'D1' dimensions would be the same value. 



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