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Electronics => Manufacturing & Assembly => Topic started by: glenenglish on September 28, 2024, 11:37:42 pm

Title: Post reflow tall electrolytic capacitor affixing (glue)
Post by: glenenglish on September 28, 2024, 11:37:42 pm
What are people using for glueing support for tall SMT electros ( panasonic A780EN476M1HLAS050)

I've got a whole load of 6.3mm dia, 10mm tall electrocs they seem quite wobbly and I'me concerned they wont like some vibration modes.

The leads are a bit more proud of the base then what I am used to .
I see many people use some soft white silicon goop, but these merely dampen the motion, not fix them .  maybe its enough

Too rigid a fix (ie epoxy)  and it will tear the mask  off the PCB, maybe , and no give with physical thermal change excursions  I dunno. depends how its done.

glen
Title: Re: Post reflow tall electrolytic capacitor affixing (glue)
Post by: helius on September 29, 2024, 01:31:15 am
Silastic a.k.a. DowSil 744 or 738.
Title: Re: Post reflow tall electrolytic capacitor affixing (glue)
Post by: Jackster on September 29, 2024, 03:07:39 am
This stuff works great for hobby level projects and is in 50ml tubes so less waste if you let it dry out.
https://www.aliexpress.com/item/1005001845373231.html (https://s.click.aliexpress.com/e/_De3cFzn)

+1 for DowSil RTVs though. We use them for production work and on my 2 stroke  :-+
Title: Re: Post reflow tall electrolytic capacitor affixing (glue)
Post by: glenenglish on September 29, 2024, 09:30:55 am
What's specific about 744, or 738 that you like (compared to the many other chemically compatible ) ?

It may end up being be a soft compound potting job.