PCB Libraries Forum Homepage
Forum Home Forum Home > Libraries > Footprints / Land Patterns
  New Posts New Posts RSS Feed - Dimensions for Terminal and Component Outlines
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

Dimensions for Terminal and Component Outlines

 Post Reply Post Reply
Author
Message
Batiskaff View Drop Down
Active User
Active User


Joined: 30 Apr 2018
Status: Offline
Points: 41
Post Options Post Options   Thanks (0) Thanks(0)   Quote Batiskaff Quote  Post ReplyReply Direct Link To This Post Topic: Dimensions for Terminal and Component Outlines
    Posted: 02 Jul 2019 at 2:07pm
Which are package dimensions are preferred to use to draw the component and terminal outlines (nominal or maximal body dimensions)? 

Are the rules similar for SMD and PTH or not?

Back to Top
Tom H View Drop Down
Admin Group
Admin Group
Avatar

Joined: 05 Jan 2012
Location: San Diego, CA
Status: Offline
Points: 4180
Post Options Post Options   Thanks (0) Thanks(0)   Quote Tom H Quote  Post ReplyReply Direct Link To This Post Posted: 02 Jul 2019 at 2:11pm
Nominal dimensions are used for the Package Body outline and the Terminal Lead outlines and in the land pattern naming convention and the default 3D STEP model (except for Package Height). 

Rules are the same across all component families. 
Stay connected - follow us! Twitter - LinkedIn
Back to Top
Batiskaff View Drop Down
Active User
Active User


Joined: 30 Apr 2018
Status: Offline
Points: 41
Post Options Post Options   Thanks (0) Thanks(0)   Quote Batiskaff Quote  Post ReplyReply Direct Link To This Post Posted: 02 Jul 2019 at 2:17pm
Thank you for help.
Back to Top
Batiskaff View Drop Down
Active User
Active User


Joined: 30 Apr 2018
Status: Offline
Points: 41
Post Options Post Options   Thanks (0) Thanks(0)   Quote Batiskaff Quote  Post ReplyReply Direct Link To This Post Posted: 03 Jul 2019 at 12:09am
I just noticed that Library Expert calculator uses maximum values of body dimensions for terminal and body outlines in all Through Hole families except Crystal(HC49). In SMD families used nominal values.
Back to Top
Batiskaff View Drop Down
Active User
Active User


Joined: 30 Apr 2018
Status: Offline
Points: 41
Post Options Post Options   Thanks (0) Thanks(0)   Quote Batiskaff Quote  Post ReplyReply Direct Link To This Post Posted: 03 Jul 2019 at 9:06am
Was this done for some reason in calculator?
Back to Top
Tom H View Drop Down
Admin Group
Admin Group
Avatar

Joined: 05 Jan 2012
Location: San Diego, CA
Status: Offline
Points: 4180
Post Options Post Options   Thanks (0) Thanks(0)   Quote Tom H Quote  Post ReplyReply Direct Link To This Post Posted: 08 Jul 2019 at 12:56pm
I looked at the through-hole calculators and most of the component families only require "Maximum Dimensions". This includes, Axial, DIP, SIP, Header, etc. 

Because the through-hole calculators only require Maximum dimensions, that's the only thing we have to go by. 

This is the reason why the Maximum Body value is used on the Component Body Outline. 

Stay connected - follow us! Twitter - LinkedIn
Back to Top
 Post Reply Post Reply

Forum Jump Forum Permissions View Drop Down



This page was generated in 0.125 seconds.