What are the 2SA1141/2SC2681 bjts??

[darkfenriz]

Hi
I've never heard before of these, found them at Polish internet shop for very cheap.

Ft of 90MHz for this power is unbelievable!

Who manufacturs them? Anyone tried these?

regards
Adam

 

[Stuart Easson]

datasheet.org.uk

shows the following info:

Part Number = 2SA1141
Manufacturer Name = NEC
Average Price = 5.28654
Description = Si PNP Power BJT
V(BR)CEO (V) = 115
V(BR)CBO (V) = 115
I(C) Abs.(A) Collector Current = 10
Absolute Max. Power Diss. (W) = 100
I(CBO) Max. (A) = -50
h(FE) Min. Static Current Gain = 60
h(FE) Max. Current gain. = 200
@I(C) (A) (Test Condition) = -1
@V(CE) (V) (Test Condition) = -2
f(T) Min. (Hz) Transition Freq = 90M
Status = Discontinued
Package = TO-247var
Military = N

HTH

Stuart

 

[darkfenriz]

Thanks Stuart
I searched 'datasheetcatalog' but found only in chinese.

 

[jacco vermeulen]

The duo has been used in a couple of audio products, but it'll take me a month to dig through my pile of junk from the early 80s. I should have a picture of an Electrocompaniet output stage with these devices and one from a different brand. If i run across the full graph datasheet i'll scan and post it. Together with Fujitsu and Toshiba, NEC lost the epitaxial race from Sanken. Unlike the other three brands, i did not manage to find a source for the 2SC NECs, the 2SA1141 i can still get for $1/pc five miles from where i live.
See HERE for other pics. The only Blue colored devices i've ever come across, SOA of the NECs is inferior.

 

[darkfenriz]

Thanks you Jacco
I found them in my supplier of Toshiba, a reliable one:
http://www.eltexco.pl/go/_search/full_search.php?sess_id=ede551dddb9a059df5fc8cf3278e5862&search_query_words=2sc2681
for less than a $.

 

[jacco vermeulen]

Thanks, Adam.

Funny, they list the 2SC2681 but not the 2SA1141(anymore?)
Overhere it's the other way around
A shame the mailing charge is a bit high for the foreign small time buyer.

 

[AndrewT]

Hi,
1141 seems to have a nice spec.
Why do devices like this become obsolete and not get replaced by a modern (better?) equivalent?