TP92-case Toshiba = manufacturer code CS???

capslock · 13th February 2003, 12:51 PM

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:
CSA
970

CSC
2240
GR

CSA
1015
GR

CSC
1815
GR

Are these genuine Toshiba parts? What does CS stand for?

Bobken · 13th February 2003, 01:34 PM

Hi,

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.

Regards,

Christer · 13th February 2003, 01:52 PM

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?).

See www.cdil.com

capslock · 13th February 2003, 07:24 PM

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.

13th February 2003, 12:51 PM	#1
capslock diyAudio Member Join Date: Feb 2002 Location: Germany	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: CSA 970 CSC 2240 GR CSA 1015 GR CSC 1815 GR Are these genuine Toshiba parts? What does CS stand for?

13th February 2003, 01:34 PM	#2
Bobken diyAudio Member Join Date: Dec 2002 Location: UK	Hi, 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. Regards, __________________ Bob

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Problem witht [code]blah[/code] ?	elseif	Forum Problems	1	17th August 2008 01:30 AM
PCB Manufacturer	Randolph	Group Buys	0	4th July 2008 05:42 PM
EIA manufacturer code	PeteMcK	Parts	1	30th January 2007 11:42 AM
Metallic case manufacturer	Koy	Pass Labs	3	18th November 2002 09:18 AM
Metallic case manufacturer	Koy	Solid State	0	15th November 2002 12:39 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	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

13th February 2003, 01:52 PM	#3
Christer 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?). See www.cdil.com

13th February 2003, 07:24 PM	#4
capslock 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.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)