[sdiy] Moving to Surface Mount - lots of questions

[appliancide]

When you do come across areas that need the 1/4W, check out the CRCW-HP series from Vishay/Dale. I found a pretty good range of values where I work (DK) and I'm sure some of the other distributors carry some common values as well.


For the time being, I will be using my employee discount to buy through-hole parts :P

Paul



----- Original Message -----
From: Tim Parkhurst <tim.parkhurst at gmail.com>
To: Harry Bissell <harrybissell at wowway.com>
Cc: xyzzy at sysabend.org; sdiy DIY <synth-diy at dropmix.xs4all.nl>
Sent: Wednesday, December 7, 2011 2:00 PM
Subject: Re: [sdiy] Moving to Surface Mount - lots of questions

On Wed, Dec 7, 2011 at 8:30 AM, Harry Bissell <harrybissell at wowway.com> wrote:
> I'd recommend 0603 resistors. They are half the size of the 1206 package. By the time you use 1206
> parts, you eat so much board space that there is little to no benefit over thru-hole parts.  The ICs are
> usually quite tiny and the PCB layout will be easier with passive components that sort of match that scale.
>

Is there any problem with the lower power rating of the 0603 package?
I can get 1206 resistors that will take 1/4 Watt (with a little
hunting, as some are only rated at 1/8W), but 0805s are only good for
1/10W and the 0603 typically will only take 1/16W. Might this
sometimes be a problem with the +/-15V supplies and 10V signals we
commonly use? I'm assuming the real solution is to go through the
circuit and use 1206 (or even 1210) packages for the few areas that
would need them, but how often would you think this comes up?


Tim (Watt?) Servo
-- 
"Sire, the church of God is an anvil that has worn out many hammers."
- H.L. Hastings
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