[sdiy] Issue with unusual SMD package size

[rsdio at audiobanshee.com]

Get some calipers and measure the actual SMD pads on your PCB. Then look at candidate capacitors from Mouser that match 4700nF 6.3V in similar sizes. For each candidate, obtain the data sheet from the manufacturer and look at the recommended pad sizes along with the actual dimensions of the part. You'll find one that will fit. So long as the specs are the same, 4700nF 6.3V, it shouldn't matter if the part is physically smaller. If you can't find any smaller, then just hope that the SMD pads on your PCB are large enough to handle a larger cap.

When I design PCB layouts, the assembly shop likes it when I make sure the pads are a bit larger than the actual parts. That's why I say it shouldn't be a problem if you locate a smaller part, so long as it fits the 4700nF 6.3V specs.

Brian


On Feb 20, 2017, at 11:40 PM, cheater00 cheater00 <cheater00 at gmail.com> wrote:
> Just a follow up. Here's the part in the service manual:
> 
> http://i.imgur.com/EhEzUfu.png
> 
> It's right above U903, above the "3" in the "U903" label.
> 
> U903 itself is a big square IC on the left side of the image.
> 
> On Tue, Feb 21, 2017 at 8:05 AM, cheater00 wrote:
>> Hi guys, I have a fairly big issue. I'm trying to repair my phone, and
>> one of the capacitors I might have to replace is specified as:
>> 
>> C824 4700nF 6.3V 1106
>> 
>> However, Mouser doesn't have a capacitor package size with code 1106!
>> What do I do? Can I use an (imperial) 1206? Can I use an imperial
>> 1005? Do I do something else? Do I go to some special capacitor house
>> that has all those weird sizes?
>> 
>> I have a second issue, too. Some capacitors are specified as 0603. How
>> do I know if that's metric or imperial? I'm reading this off some
>> wonky Korean service manual pdf, it's not really forthcoming or really
>> well written at all.
>> 
>> Thanks for any tips!