SOD-123 adapter  - Page 1
Forum section: electronics / beginners

author: Back2Volts
author_rank: Unknown
timestamp: February 11, 2017, 02:00:40 am
content: I am working on a project that uses an SOD-123 constant current regulator. I thought I could use an adapter for 0805 it is not a good fit. I run a search on eBay but could not find any adapter specific for SOD-123. Should I be looking for adapters for some another package that may be size compatible ?

author: nanofrog
author_rank: Super Contributor
timestamp: February 11, 2017, 06:09:01 am
content: TheSCHMARTBOARD 201-0003-01will work (capable of 4x SOD-123 components), as will their203-0001-01(please note this is for a 4 pack, so less expensive per board vs. the first link, though the 1st link is more versatile).

author: Back2Volts
author_rank: Unknown
timestamp: February 11, 2017, 03:19:00 pm
content: I like the second SCHMARTBOARD. High quality for sure, but it is a bit more that I would like to spend.I have been looking at the adapters I have on hand and at a SMD solder learning board and one of the following will work:1) Mount them in diagonal in a 0805 adapter, so it has each leg in opposing pads in two slots. An 8x adapter can allow for 6x slanted.2) Mount them in a SOIC adapter, spanning 4 pins, fitting up to 4 in the adapter.3) Mount them in 1206 adapters (which I don't have and I have just ordered for next time)I am going to go with #1. It is more straight forward.Thanks once more nano.

author: nanofrog
author_rank: Super Contributor
timestamp: February 11, 2017, 05:30:58 pm
content: Quote from: Back2Volts on February 11, 2017, 03:19:00 pmYou're welcome.I assume you mean one of these (0805, 0603, 0402 to DIP)?FWIW,FR4 DIY protoboardsmight be of interest as 0805 fits nicely between holes (.100 spacing).

author: Back2Volts
author_rank: Unknown
timestamp: February 12, 2017, 02:21:57 am
content: QuoteYesQuoteI am mounting this project in one of those boards and it did occur to me and tried to position the SOD-123 device would fit with the little leads resting tangentially to two adjacent rings. I thought the adapters would provide larger pads with better power dissipation, but I may be wrong. I will be mounting four units of this devicehttp://www.farnell.com/datasheets/1796577.pdf?_ga=1.77469846.243815323.1449109086Recently I have been toying with one of these other boards which seem to be a little better for SMD. I was able to solder an SOT-23 and 0406 resistors. But not using it in this project.http://www.robotshop.com/en/100x75mm-protoboard-double-sided.htmlBack to the round pads breadboard, would you solder the part over the rims of the holes or pre-fill the holes and solder on centers ?

author: nanofrog
author_rank: Super Contributor
timestamp: February 12, 2017, 04:29:52 am
content: Quote from: Back2Volts on February 12, 2017, 02:21:57 amAnother possibility would be use a 1206 adapter PCB (example; $0.3625 per breakout board), as the dimensions should work quite nicely (with nice large pads). And to enhance matters further, they're easy to find and inexpensive to boot.The other link to various package adapters might be useful as well. Best of luck.In terms of the PTH dual sided prototyping boards (I prefer FR4 to FR2 <fiberglass vs. paper respectively>), but it's entirely up to you. Personally I prefer to fill the void & solder the part in one go and/or just solder to the rim of the hole.Please note that my ESD rubber matting keeps the solder from flowing to adjacent holes (PCB lays flat on ESD mat).Another interesting adapter board and/or other breakout boards for other packages that come in at a much lower price point vs. Schmart Boards (I have to admit that the Schmart Boards are nice though; I grabbed all remaining on the shelves in a Radio Shack that was set to be closed).Quality is likely be diminished vs. contracted PCB houses however (I haven't the boards the do a proper comparison).Breakout PCB SMD 0402 0603 0805 1206 SOT23 SOT223 SOT323 - gold surface20pc SOP8/SOP10/SOP14/SOP16/SOP20/SOP24//SOP28/QFN32 to DIP Pinboard SMD Adapter(i.e. ~$0.165 per board)10x SOP20 SSOP20 TSSOP20 to DIP20 PCB SMD DIP Adapter Plate Pitch 0.65“ to 1.27mm(select the package/s you require; and I'd recommend buying multiple packages you expect to use.)Best of Luck, and I hope this helps.