Ultra high power Russian semiconductors--ID and specs - Page 1
Forum section: electronics / general

author: bdunham7
author_rank: Super Contributor
timestamp: June 07, 2019, 04:49:56 pm
content: I have a small box of various semiconductors dating back to around 1992. I dug them out as part of my 30-year cleanup and organization campaign and I have a few questions about them. The photo has two examples.First, is there a reliable source for the specifications for these? I see some of them are available on Alibaba and from various Eastern European sellers, also PowerEx seems to have some similar products. I have seen it alleged (via Google Translate and some dodgy website) that the 161-200 and 161-250 rectifiers (foreground in picture) are fast-recovery or Schottky or ... something. That 161-250 has a forward voltage of 0.32V on my DMM at room temperature.Second, what type of fixture are the disc-type units installed in? The disc one in the photo is a TDR273-1250-32, which I believe is a 1250 Ampere 3200 Volt SCR. The heat that such a device would dissipate at full load would be...a lot. And the two parts would need to be well insulated--I have other units rated at 500A / 5600V. And again, the full specs would be a bonus.

author: daqq
author_rank: Super Contributor
timestamp: June 07, 2019, 05:31:25 pm
content: QuoteThis is a pretty common package for the insanely high powered SCRs. The fixtures vary according to application, but generally it's two plates between which the thyristor is squished. See:https://www.vishay.com/docs/95544/mounting.pdfhttps://www.google.com/search?biw=2048&bih=1042&tbm=isch&sa=1&ei=G5_6XKvtNKil1fAPhtutwAw&q=puck+thyristor+mounting&oq=puck+thyristor+mounting&gs_l=img.3...61281.63440..63640...3.0..0.71.791.12......0....1..gws-wiz-img.......0i5i30.J_Yjk27-olkhttps://www.appliedps.com/ClampBrochure.pdf

author: tszaboo
author_rank: Super Contributor
timestamp: June 07, 2019, 05:53:58 pm
content: They are the compatible version of 2N2221 and the BAS21. The problem with soviet microelectronics is that it doesn't fit thought the factory door.No, but jokes aside, the soviet electronics component output (number of units made) was 30 times smaller in 1988 than the USA.It is difficulty to find datasheets, because it was only in russian, and they were not publicly available. These simple componens you could very likely only buy if you were a in the millitary. Not a contractor, not a third party privately owned company, that didn't exist. Datasheet was like a book with all the components that you cannot get, because they are behind with the 5 year plan.And of course in 1992, everyone grabbed whatever was movable at work and sold it on the black market.

author: Canis Dirus Leidy
author_rank: Regular Contributor
timestamp: June 07, 2019, 06:00:09 pm
content: Quote from: bdunham7 on June 07, 2019, 04:49:56 pmUnfortunately, full specs only in Russian (one of the first results for the query "диод д161" in Google):https://eandc.ru/pdf/silovye-pribory/d161.pdfQuote from: bdunham7 on June 07, 2019, 04:49:56 pmWell, it depends on what is considered "fast." The documentation indicates the maximum operating frequency of 500 Hz. Chip & Dip (and other vendors) on their websites for some reason write about a maximum frequency of 2 kHz.Quote from: bdunham7 on June 07, 2019, 04:49:56 pmA specially trained radiator like this:https://asenergi.com/catalog/ohladiteli/ohladiteli-tabletochnye/o153.htmlQuote from: bdunham7 on June 07, 2019, 04:49:56 pmWell… Can't find anything about TDR. If you mean just T273 then here (again, only in Russian):https://eandc.ru/pdf/silovye-pribory/t273-1250.pdfP.S. The site of one of the manufacturers has an English version, but there are only absolute maximum ratings:http://elvpr.ru/en/poluprovodnikprib/diody/index.phphttp://elvpr.ru/en/poluprovodnikprib/tiristory/nizkochast_tabl.php

author: duak
author_rank: Super Contributor
timestamp: June 07, 2019, 06:22:25 pm
content: These look very much like the "hockey-puk" package. Here's how to mount them:https://www.vishay.com/docs/95544/mounting.pdf

author: Gyro
author_rank: Super Contributor
timestamp: June 08, 2019, 08:56:17 pm
content: You need to be very careful to get the right mounting pressure with hockey puck devices, too little pressure and you get poor thermal andelectricalconduction. They can even appear open circuit when not clamped as they rely on mechanical pressure for contact between the end caps and the die (well, wafer!).Too much pressure on the other hand, andcrack!

author: amyk
author_rank: Super Contributor
timestamp: June 09, 2019, 04:34:00 am
content: From the datasheet,Quotetranslates toQuoteor roughly 4 to 5metric tonsof force.

author: Canis Dirus Leidy
author_rank: Regular Contributor
timestamp: June 09, 2019, 04:07:34 pm
content: Quote from: amyk on June 09, 2019, 04:34:00 amWelcome to thewonderful world of wrenches and bolted joints!