[sdiy] [hp_agilent_equipment] Re: [Electronics_101] Where to get capacitor and resistor kits?
cheater00 at gmail.com
Mon Mar 20 18:16:42 CET 2017
Great find, thanks.
One thing I didn't find out is this: if the part has an msl higher than 1,
then will it effectively stay at "zero time" while still on the tape?
Thanks a lot
On Mon, 20 Mar 2017 16:00 Mark Goldberg marklgoldberg at gmail.com
[hp_agilent_equipment], <hp_agilent_equipment at yahoogroups.com> wrote:
> On Mar 20, 2017 3:01 AM, "cheater00 cheater00 cheater00 at gmail.com
> [hp_agilent_equipment]" <hp_agilent_equipment at yahoogroups.com> wrote:
> I wasn't aware of the issue with moisture absorption by SMT parts. That is
> a very important consideration. What is the shelf life of such parts in a
> "pill box" enclosure, stored in a normal home environment?
> SMT parts have a Moisture Sensitivity Level or MSL rating that defines how
> long they can be outside the packaging before needing to be baked. If you
> get them from a reliable distributor, they will tell you the rating.
> IPC/JEDEC J-STD-020E will tell you more than you want to know about this,
> but you probably do not have access to it. Google will find lots of info if
> you search though.
> I have a reflow oven and can bake the parts. They do store parts in
> cabinets full of dry nitrogen, and in sealed bags with absorbent packs. The
> caps I got from Digikey were rated MSL 1 or unlimited.
> There also is a concern about oxidation of the contacts leading to bad
> soldering. Good flux will help that.
> I live in AZ where this is less of a problem than any humid place.
> Posted by: Mark Goldberg <marklgoldberg at gmail.com>
> Visit Your Group
> - New Members
> [image: Yahoo! Groups]
> • Privacy <https://info.yahoo.com/privacy/us/yahoo/groups/details.html> •
> <hp_agilent_equipment-unsubscribe at yahoogroups.com?subject=Unsubscribe> • Terms
> of Use <https://info.yahoo.com/legal/us/yahoo/utos/terms/>
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the Synth-diy