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Chip Caps and Resistor w/No Terminal Tolerance

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=3627
Printed Date: 11 Mar 2026 at 9:19am


Topic: Chip Caps and Resistor w/No Terminal Tolerance
Posted By: pcbfreedomcad
Subject: Chip Caps and Resistor w/No Terminal Tolerance
Date Posted: 11 Mar 2026 at 5:14am
What is entered in the tool for L and L1, when there is no tolerance for lead length given in the datasheet? 

I am thinking of Chip Capacitor and Resistor terminal tolerances. 


Replies:
Posted By: Tom H
Date Posted: 11 Mar 2026 at 8:31am
When L and L1 dimensions are the same, only enter L (don't enter duplicate dimensions). 

L1 is optional if it's different than L. 

I recommend that you open the free SM Discrete.fpx file and sort the Case Code Column. 

Then search for similar Case Codes from other manufacturers and see what their Terminal Lead Tolerances are. 

Sometimes the component manufacturer will only provide the Minimum dimension and you need to figure out the Maximum dimension. 

Average Terminal Tolerances for chip components by Case Code:
  • 01005 - 0.03
  • 0201 - 0.05
  • 0402 - 0.10
  • 0603 - 0.15
  • 0805 - 0.20
  • 1206 - 0.25
  • 1812 - 0.30



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