Source of those ceramic spacers/standoffs for hot components/power resistors? - Page 1
Forum section: electronics / general

author: cvanc
author_rank: Frequent Contributor
timestamp: September 19, 2018, 07:14:17 pm
content: (I'm in the U.S. FWIW)Hi all-I found these at Digi-Key and bought somehttps://www.digikey.com/product-detail/en/essentra-components/CER-3/RPC2173-ND/3811720But I'd like to find something taller and I'm coming up empty.The I.D. of the one I got is fine, it's 1.6mm for my resistor lead of about 1.1mmI'd like to find a larger O.D. so it's more likely to stand up straightAnd the height of the one I got is only 10mm.... would really like to roughly double that to 19 or 20mm. These resistors run HOT and have really done a number to the board. I'm gonna need to spend some quality time with a Dremel to clean the mess up, and I don't want it to happen again.Thanks!

author: onesixright
author_rank: Frequent Contributor
timestamp: September 19, 2018, 07:21:21 pm
content: Quote from: cvanc on September 19, 2018, 07:14:17 pmAny change you can use 2 of those?Sent from my iPhone using Tapatalk

author: cvanc
author_rank: Frequent Contributor
timestamp: September 19, 2018, 08:20:35 pm
content: Quote from: onesixright on September 19, 2018, 07:21:21 pmYeah that's what I'll do for now but it's not elegant. Would like to find a neater answer that won't bend around in transit.(and sorry for the weird cut-n-paste crap in my original post, glitch in the Matrix I guess, I've cleaned it up)

author: Gregg
author_rank: Super Contributor
timestamp: September 20, 2018, 04:42:29 am
content: McMaster to the rescue. They are always worth checking for fasteners and materials.https://www.mcmaster.com/standard-threaded-standoffs

author: cvanc
author_rank: Frequent Contributor
timestamp: September 21, 2018, 01:31:24 am
content: Quote from: Gregg on September 20, 2018, 04:42:29 amNope, nothing there is better than what I've already found.If you sort for ceramic only with a hole that goes all the way thru you get just one match and it's shorter than what I got from Digi-Key.I suppose I could consider metal standoffs, many are available thru-hole & 19/20mm tall, but that just doesn't seem like a good idea.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: September 21, 2018, 02:06:34 am
content: A thought, if you need to support a big bulky component like a wirewound power resistor, you can rout a hole in the PCB under the component, so it can sit relatively low over, or in, the board while allowing airflow around it.Don't think I've seen that very much, or ever? Could be handy for some situations though.Tim

author: InductorbackEMF
author_rank: Regular Contributor
timestamp: September 21, 2018, 02:17:03 am
content: That is a neat idea thanks Tim!Alex.

author: rdl
author_rank: Super Contributor
timestamp: September 21, 2018, 06:45:29 am
content: Keystone makes some close to what you want and they're in stock at Mouser, but way more expensive that I would have expected. I think what Tim suggested is a good idea.https://www.mouser.com/Keystone-Electronics/_/N-1z0zlc0Z1yzvvqx?Keyword=standoff+ceramic&FS=True

author: cvanc
author_rank: Frequent Contributor
timestamp: September 21, 2018, 11:51:53 am
content: Quote from: T3sl4co1l on September 21, 2018, 02:06:34 amThat's a great idea.Sadly this is a retrofit situation and there just isn't room to do it. But thanks for the thought, I might steal it in the future

author: cvanc
author_rank: Frequent Contributor
timestamp: September 21, 2018, 11:53:52 am
content: Quote from: rdl on September 21, 2018, 06:45:29 amOh yeah, some of these are surprisingly spendy!I looked at this series earlier (well, the 6-32 size anyway) and they do not have a hole all the way thru. No way to slide them over a component lead.