TP92-case Toshiba = manufacturer code CS??? - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Solid State Talk all about solid state amplification.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 13th February 2003, 11:51 AM   #1
diyAudio Member
Join Date: Feb 2002
Location: Germany
Default TP92-case Toshiba = manufacturer code CS???

I have all kinds of small signal parts that were originally sources by Toshiba. All of them have a CS in front of the part number, and the marking looks slightly diffent from what I know from Toshiba parts in other cases.

So the marking is:




Are these genuine Toshiba parts? What does CS stand for?
  Reply With Quote
Old 13th February 2003, 12:34 PM   #2
Bobken is offline Bobken  United Kingdom
diyAudio Member
Join Date: Dec 2002
Location: UK

I have some genuine Toshiba parts like these which were sent to me direct by Toshiba (not through any distributor) and they are marked differently from yours. However, I have had them for probably ten years or so.

No doubt you have realised that the correct Toshiba part numbers have a '2' in place of your 'C' i.e. 2SA970, rather than yours marked as CSA970 etc.

All of the devices I have here are simply marked for example "C2240 BL* 2C.

* This is the hFE (gain group) classification, of course.

With some similar devices of a different gain group, the last two letters are also different for example "C2240 GR OA" but I don't think that these last two letters are indicative of any parameters.
I think (I'm not absolutely certain) that these two last letters relate to a 'batch', in manufacture, or perhaps a date.

Unless they have changed over the years (possibly unlikely?) I would be concerned over how genuine yours are.

I hope this helps, even though it may not be very good news.

  Reply With Quote
Old 13th February 2003, 12:52 PM   #3
diyAudio Member
Join Date: Sep 2002
Location: Sweden
Maybe the transistors are manufactured by CDIL? They seem
to label many of their transistors that way, if I understand their
product lists correctly. Interestingly, as was mentioned in
another thread the other day, I have a bag of transistors
branded CDIL, but using a different type of naming, not
appearing in their product list (real or fakes?).

  Reply With Quote
Old 13th February 2003, 06:24 PM   #4
diyAudio Member
Join Date: Feb 2002
Location: Germany
Thanks Christer, this seems to be the answer. Cdil apparently completely replace the 2S with CS in their part numbers. Has anybody seen a data sheet by Cdil to know whether they match up with the original specs?

From power transistors, I know that some parts carrying even exactly the same part number will according to the second source manufacturer's data sheet only match voltage and current rating of the original devices, with gain, f_T and capacitances being much worse.
  Reply With Quote


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Problem witht [code]blah[/code] ? elseif Forum Problems 1 17th August 2008 12:30 AM
PCB Manufacturer Randolph Group Buys 0 4th July 2008 04:42 PM
EIA manufacturer code PeteMcK Parts 1 30th January 2007 10:42 AM
Metallic case manufacturer Koy Pass Labs 3 18th November 2002 08:18 AM
Metallic case manufacturer Koy Solid State 0 15th November 2002 11:39 AM

New To Site? Need Help?

All times are GMT. The time now is 04:52 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2