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Subject:	Re: Capacitor 0603 vs 0402
From:	[log in to unmask]
Reply To:	TechNet E-Mail Forum.
Date:	Wed, 8 Aug 2001 17:17:45 -0500
Content-Type:	text/plain
Parts/Attachments:	text/plain (68 lines)

Hi Glenn! I would add to your list one advantage: 0402's can be
electrically advantageous in RF type circuits; and one disadvantage: an
increased inability to visually inspect the solder joints. Good Luck.

Dave Hillman
Rockwell Collins
[log in to unmask]





"Pelkey, Glenn" <[log in to unmask]>@IPC.ORG> on 08/08/2001 02:55:31
PM

Please respond to "TechNet E-Mail Forum." <[log in to unmask]>; Please respond
      to "Pelkey, Glenn" <[log in to unmask]>

Sent by:  TechNet <[log in to unmask]>


To:   [log in to unmask]
cc:

Subject:  [TN] Capacitor 0603 vs 0402




Hi all,

        I'm brainstorming on risks and benefits of 0603 caps vs 0402 caps.
If the cap value, voltage rating, dielectric material, terminations, and
use conditions are the same, would one be better than the other?  My
thoughts are it would be a wash or at least not significant.  Here's what I
have so far:

Benefits of 0402 vs 0603:
Smaller size reduces thermal stress/strain on solder joints from CTE or
board flexing.
Smaller size uses less real estate on board

Risks of 0402 vs 0603:
Equipment may have difficulty placing
Thinner dielectric spacing to achieve same capacitance, cap higher failure
rate
Smaller size, cracks easier to develop
Higher risk of tombstoning

        What do you all think?  I'm sure I missed something, maybe even
wrong on some of the above.

Thanks,

Glenn



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