CBC184LB and CBC212L

[dubwarrior]

Hello im Looking for the Datasheets of those transistors.

But i was unable to find something specific.

I`ve only found this

http://www.chipdocs.com/pndecoder/datasheets/CDIL/BC184L.html
http://chipdocs.com/pndecoder/datasheets/ME/BC212L.html

Wich s writen that they are similar to the CBC...

DO somebody got some information about those transistors?
Or are they close enough to the BC .. ones, do they have the same pin layout.


Thank you very much for yor help

Regards

Rico

 

[hobiesound]

just guessing though, but i would assume that they are just bog standard BC184LB and BC212L transistors. I think the C in front is a manufacturer code. For standard usage i think you wouldn't have to worry about that prefix at all. And for the pin-out what's stopping you from trying? and if you don't dare do that get one of those super cheap DMM with transistor tester and just try it till you're getting a normal reading.

greets,

Thomas

 

[smallbutfine]

Hi,
I guess the story about the 'CBC' marking on transistors is kind of a laugh actually.
They are BC transistors, where the Collector leg is marked with the letter 'c' on the transistor's casing. If you look at them, it reads like cBCxxx.
The parts broker's stock workers just read *what they see*, and so you get 'CBCsomething' codes.
Therefiore you might never find them in manufacturer lists or datasheets (they *do* know what they are producing), only on BOMs and at the brokers stock lists (where people are involved that *do not* know what they are actually doing).
I guess I read about this before and was so amused that this stucks in my memory, when I found transistors like this on some older PCBs while slaughtering for parts.

As always, correct me if you know better anyone...always willing to learn from errors.

Kind regards,
Martin

PS: Sometimes manufacturers cram everything on the package whereever they find the place (or not...)
look for a BC639: http://images2.dhd24.com/36905942.jpg
And if you look at the silver-colored Philips BC337, on the case you can read only 'C337' (I guess there simply wasn't enough room for the 'BC' at all)

 

[smallbutfine]

Nice link to the official standards of transistor marking (non-smt).
http://www.qsl.net/yo5ofh/doc/transistor_codes.htm
It is very obvious, that no standard code can begin with CBC, otherwise, it is not a crypted OEM number (they use these codes to make re-engineering a bit harder, just like rubbing out codes from IC's etc. Or they can sell these 'special parts' exclusively as service parts for teir products.

And another laugh: I made a mistake on my own in above post:
C337 is actually a (abbrev. marking) 2SC337, not a BC337. Comparing datasheets from the japanese transistor handbook to fairchild datasheet for the BC reveals they are actually *different* in specs. Well, I and others bought the japanese as 'bc337'. General purpose silicium. Doesn't seem to matter anyway, ha. Aaand I did not know Philips is usin japonese markings......welcome to twilight zone.
Last edit: As of Philips BC337 datasheet: C337 IS BC337 NOT made in Hongkong or China Factory. (wtf??? well, speaking of 'standards' ;D...)



'... It's almost too easy. ' (Garth Algar)

 

[dubwarrior]

just guessing though, but i would assume that they are just bog standard BC184LB and BC212L transistors. I think the C in front is a manufacturer code. For standard usage i think you wouldn't have to worry about that prefix at all. And for the pin-out what's stopping you from trying? and if you don't dare do that get one of those super cheap DMM with transistor tester and just try it till you're getting a normal reading.

greets,

Thomas

Thanky you very much, the problem is i dont know how to measure them, to find out the pin Layout ;-) and they are already soldered in in a PCB.

Hi,
I guess the story about the 'CBC' marking on transistors is kind of a laugh actually.
They are BC transistors, where the Collector leg is marked with the letter 'c' on the transistor's casing. If you look at them, it reads like cBCxxx.
The parts broker's stock workers just read *what they see*, and so you get 'CBCsomething' codes.
Therefiore you might never find them in manufacturer lists or datasheets (they *do* know what they are producing), only on BOMs and at the brokers stock lists (where people are involved that *do not* know what they are actually doing).
I guess I read about this before and was so amused that this stucks in my memory, when I found transistors like this on some older PCBs while slaughtering for parts.

As always, correct me if you know better anyone...always willing to learn from errors.

Kind regards,
Martin

PS: Sometimes manufacturers cram everything on the package whereever they find the place (or not...)
look for a BC639: http://images2.dhd24.com/36905942.jpg
And if you look at the silver-colored Philips BC337, on the case you can read only 'C337' (I guess there simply wasn't enough room for the 'BC' at all)

Danke viel mal auch dir.

I think the first C isnt the collector, cause if i take a look in the Datasheet of the BC 184LB, the collector is in the middle.
If you look on the flat, the first pin lect is the ermitter, where the C is.

But, i think they are the same as the BC184LB.
According to the link from you with the Transistor Codes, they must be Si small Signal tranistors.

Thanky you

 

[tv]

I also bought the "shorthand" code transistors. Most recently, this was a BC550C, "silverface", and the code is: C550C PH12.

It sounds Really Good in application.