Transistor identification (and substitutes) available readily in UK

[David C. Partridge]

Body marked as follows

FPN
4249
EBC

has blue paint dab on back. It's pretty clear what the EBC marking means.

I know it is PNP from the schematic which says type is TO203 but I don't
recognise that either.

 

[Allodoxaphobia]

Body marked as follows

FPN
4249
EBC

has blue paint dab on back. It's pretty clear what the EBC marking means.

I know it is PNP from the schematic which says type is TO203 but I don't
recognise that either.

Probably a plastic ("PN4249") 2N4249. Dunno 'bout the "F".

Jonesy

 

[David C. Partridge]

Thank you.

That was my immediate suspicion, but I don't have any specs for that - can
anyone help with specs for the 2n4249 (assuming that is what it is) or can
give a definitive identification?

Web search on "2n4249 specification" didn't help much

David

 

[N Cook]

what sort of date ?

 

[Anna Daptor]

Thank you.

That was my immediate suspicion, but I don't have any specs for that - can
anyone help with specs for the 2n4249 (assuming that is what it is) or can
give a definitive identification?

Web search on "2n4249 specification" didn't help much

Try here http://www.datasheetcatalog.com/datasheets_pdf/2/N/4/2/2N4249.shtml

 

[Do Little2]

Thank you.

That was my immediate suspicion, but I don't have any specs for that - can
anyone help with specs for the 2n4249 (assuming that is what it is) or can
give a definitive identification?

Web search on "2n4249 specification" didn't help much

Industry Number : 2N4249
NTE Device Number: NTE159
T-PNP,SI-AF PREAMP,DRIVER,TO-92

For more info, download the free NTE cross reference Version 12,
located at: http://www.nteinc.com/

 

[David C. Partridge]

Guessing late 70s it's in the bright-up circuit of the D85 or D75 scopes.

TR353 FWIW if you have the circuit diagram (I blew it while probing and hand
slipped).

Dave

what sort of date ?

 

[David C. Partridge]

Trouble is AFAIK NTE don't deal over here in UK.

I'm also not certain of the identification as a plastic 2n4249 :-(

It could I suppose be the Fairchild version of the PN4249 (plastic 2n4249),
but not having one to hand I dunno how they are marked.

Dave

 

[N Cook]

Guessing late 70s it's in the bright-up circuit of the D85 or D75 scopes.

TR353 FWIW if you have the circuit diagram (I blew it while probing and hand
slipped).

Dave

what sort of date ?

I would suggest try a complement to 2N199(0U?)/(OU?) , used in D75 circuit
as complement to your duff one,adjusting pinning if necessary. FPN.... maybe
Fairchild as Telequipment tied in with Tektronix around time of D75.

 

[Jim Adney]

Probably a plastic ("PN4249") 2N4249. Dunno 'bout the "F".

Fairchild?

-

 

[Franc Zabkar]

Body marked as follows

FPN
4249
EBC

has blue paint dab on back. It's pretty clear what the EBC marking means.

I know it is PNP from the schematic which says type is TO203 but I don't
recognise that either.

My old "Towers International Transistor Selector" lists the PN4249:

PNP
TO92
L14 pinout (EBC)
Vcb=60V
Vce=60V
Veb=5V
Ic=100mA
Tj=150C
Ptot=600mW in free air
ftmin=100MHz
Cob=5pF
hfe=100min
hfe_bias=100uA
use=ALN (audio, low current, low noise)
manf=NAT (National Semiconductor)
EUR equiv=BC204
USA equiv=2N4249

Towers attributes the PN prefix to Newmarket:

PN = Newmarket, plastic version of equivalent '2N' number

The 2N4249 is listed as having been manufactured by "FCU" which is
Fairchild Semiconductor.


- Franc Zabkar

 

[David C. Partridge]

That seems pretty clear identification! I'm subbing with a 2n2907A

David

 

[Robby]

Web search on "2n4249 specification" didn't help much

Maybe not, but just searching "2n4249" in Yahoo, (The ONLY search engine
IMHO) produced about 133 hits, many claiming specs for it. Sometimes the
simplest search term is the best. You can always tweak it from there.

 

[Tom MacIntyre]

Maybe not, but just searching "2n4249" in Yahoo, (The ONLY search engine
IMHO) produced about 133 hits, many claiming specs for it. Sometimes the
simplest search term is the best. You can always tweak it from there.

Third hit of 75 when Googling 2n4249 spec

http://www.americanmicrosemi.com/products/specs/2N4249.phtml

Transistors » Transistors; Bipolar; Si PNP Low-Power » Bipolar; Si PNP
Low-Power
Part Number 2N4249
Military/High-Rel N
V(BR)CEO (V) 60
V(BR)CBO (V) 60
I(C) Max. (A) 100m
Absolute Max. Power Diss. (W) 200m
Maximum Operating Temp (øC) 150õ
I(CBO) Max. (A) 10nØ
@V(CBO) (V) (Test Condition)
V(CE)sat Max. (V)
@I(C) (A) (Test Condition)
@I(B) (A) (Test Condition)
h(FE) Min. Current gain. 100
h(FE) Max. Current gain.
@I(C) (A) (Test Condition) 100u
@V(CE) (V) (Test Condition) 5.0
f(T) Min. (Hz) Transition Freq 100M
@I(C) (A) (Test Condition)
@V(CE) (V) (Test Condition)
C(obo) (Max) (F) 6.0p
@V(CB) (V) (Test Condition)
@Freq. (Hz) (Test Condition)
Package Style TO-92
Mounting Style T
Pinout Equivalence Code 3-12
Description

Tom