Phil,

 I would not worry. It sounds like some passives sales person want to drive folks to more expensive passives. He/She probably increases a commission that way.

0603 will be around for a long time. I can still buy 1/4 watt leaded resistors too! 😊

Bob K.


-----Original Message-----
From: TechNet <[log in to unmask]> On Behalf Of Nutting, Phil
Sent: Tuesday, June 26, 2018 9:58 AM
To: [log in to unmask]
Subject: Re: [TN] Passive component downsizing

We were notified many "common" 0603 MLCCs were going to 52 week lead times.  The world is going to smaller packaging.  Ok, so how do I make 20 kilowatts with 0402 parts?  We work in brute force, 1,200 volts at 100 amps, and still use thru hole parts because they can handle the power.  I can see it now, we will use fifty 0201 resistors to get the power level we need.  Geesh!

It is going to be interesting how we build in a world of smaller parts.

I know, you can't buy a '57 Chevy new anymore.  But imagine if you could  Cool!

Phil

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Nigel Burtt
Sent: Tuesday, June 26, 2018 9:48 AM
To: [log in to unmask]
Subject: Re: [TN] Passive component downsizing

Of course, hence "...suitably limited implementation..." in my post.

I'm thinking of assembly problems: printing, SPI, placement, reflow, AOI etc -  even if one could come up with a suitable mixed footprint stencil aperture, would the resulting solder joint meet IPC-A-610 visual inspection acceptability conditions for example.

Then there is the in-service-reliability aspect of the solder joints