mechanical durability of 0201 vs 0402 for resistors and capacitors - Page 1
Forum section: electronics / beginners

author: alexg
author_rank: Regular Contributor
timestamp: January 06, 2017, 04:32:47 am
content: Hi All, I cant quite find any data on net, which package is more durable once placed on PCB, 0402 or 0201 for resistors and capacitors?0201 looks very attractive when it comes to saving space on PCB however I am not sure if it more prone to breakage in case of excessive vibration, cold temperature or warping of the PCB?Thanks in advance.

author: vealmike
author_rank: Regular Contributor
timestamp: January 06, 2017, 08:46:24 am
content: It should be better. Halve the component dimensions in X-Y-Z and you quarter the mass.Board warpage is not an issue for small components, PCB flatness is typically 1mm in 100mm. Work that out over the length of an 0201...If your environment is harsh enough to rattle an 0402 off the board, you have much bigger problems to deal with elsewhere on your board.

author: mrpackethead
author_rank: Super Contributor
timestamp: January 06, 2017, 09:00:52 am
content: and 10x as hard to place.

author: AndyC_772
author_rank: Super Contributor
timestamp: January 06, 2017, 09:14:56 am
content: That's your CEM's problem, and 0201 is not a new package. Any half decent commercial CEM should be able to assemble a board using 0201 without issue.When it comes to shock and vibration, it's the big components that are a potential issue, not the tiny ones. Inductors - especially surface mount - are often the first to go. QFNs can fail if the board is twisted, because they span a reasonable distance and have no compliance to accommodate the distortion.

author: joseph nicholas
author_rank: Frequent Contributor
timestamp: January 06, 2017, 10:47:43 am
content: I came across an 0804 100uf capacitor on ebay. Is this possible with such a small mass?

author: Inflex
author_rank: Regular Contributor
timestamp: January 06, 2017, 10:56:36 am
content: Quote from: joseph nicholas on January 06, 2017, 10:47:43 amCertainly is. Just filter down 0805 and 100uF at places like Element14 / Digikey / Mouser. Surprisingly cheap too considering how compact they are.http://au.element14.com/webapp/wcs/stores/servlet/Search?catalogId=15001&langId=43&storeId=10184&categoryId=800000088005&eq=N%3D222650%2B2101%26amp%3BNtk%3Ddesc_pn%26amp%3BNtt%3D100%25c2%25b5f%2B0805%26amp%3BNtx%3Drel%2Bgensearch_store_specific%252cstatic%2528P_STORE_MARKETING_RANK_FARNELL_AU%252cascending%2529%2Bmode%2Bmatchpartialmax%26amp%3BNty%3D1%26amp%3BNtpc%3D1%26amp%3BNtpr%3D1%26amp%3BD%3D100uF%2B0805*%26amp%3BDn%3D2101%2B2101%26amp%3BDx%3Dmode%2Bmatchall&st=100uF%200805&pageSize=25&showResults=true&aa=true&pf=110089642,111854952&vw=

author: rs20
author_rank: Super Contributor
timestamp: January 06, 2017, 11:15:18 am
content: Quote from: joseph nicholas on January 06, 2017, 10:47:43 amJust beware of DC bias effects -- if you plan to use this to decouple 5V, or even 3V3, the actual capacitance will drop well below 100uF:

author: alexg
author_rank: Regular Contributor
timestamp: January 06, 2017, 02:46:20 pm
content: Quote from: vealmike on January 06, 2017, 08:46:24 amAwesome, i will go with 0201 then, thanks for info.

author: alexg
author_rank: Regular Contributor
timestamp: January 06, 2017, 02:48:13 pm
content: Quote from: mrpackethead on January 06, 2017, 09:00:52 ambut so much fun under microscope, I think the real problem I had with it is that silk layer is impossible to draw around individual components if they tightly placed next to each other so finding proper component on board is a bit challenging, placing and soldering part is fun

author: Inflex
author_rank: Regular Contributor
timestamp: January 06, 2017, 02:51:43 pm
content: Quote from: alexg on January 06, 2017, 02:48:13 pmAnd that's when you create yourself a Boardview file

author: bson
author_rank: Unknown
timestamp: January 06, 2017, 11:17:28 pm
content: Quote from: alexg on January 06, 2017, 02:48:13 pmJust print yourself a board view with component ref IDs and values visible, at 400% magnification if needed and use that to navigate.

author: mrpackethead
author_rank: Super Contributor
timestamp: January 06, 2017, 11:22:04 pm
content: Quote from: AndyC_772 on January 06, 2017, 09:14:56 amEven I can place 0201 by hand that is not the point. And it can be done repeatably and relaibly. Thats not being debated. However it is significnatly harder than 0402 and to obtain good yeilds that dont reuire rework you need to carefully consider layout masks paste etc when you design it. simply saying its your assemblers problem is putting your head in the sand and saying that fire over there wont arrive because i cant see it.

author: amyk
author_rank: Super Contributor
timestamp: January 07, 2017, 01:33:49 am
content: Not brave enough to try 01005? Apparentlysome people have hand-soldered them.

author: Inflex
author_rank: Regular Contributor
timestamp: January 07, 2017, 02:07:46 am
content: Quote from: amyk on January 07, 2017, 01:33:49 amGiven that 0603, or at least 0402 would have fit on there nicely, one does have to wonder "Why?", still quite a feat of hand skills (would one dare risk a hot-air reflow?)

author: that_guy
author_rank: Contributor
timestamp: January 09, 2017, 05:34:05 pm
content: Quote from: amyk on January 07, 2017, 01:33:49 amI think I count 5 on there swimming in all that solder...

author: alexg
author_rank: Regular Contributor
timestamp: January 28, 2017, 03:26:14 am
content: QuoteJust had to play with 01005 package and it was soo much fun I tellya, love it.... I had no two solder pads on all of my PCBs to be close enough for that package other than pads for 8-VDFN chip which is already ridiculously small. But. It is not as scary as it seems to be.In the picture below, two at at the top are the resistor and capacitor in 01005 package, one in the middle is 0201 cap and on on the bottom right is 0402 cap for size comparison. I can see some significant space saving with these babies.