Continental Device India Limited
An ISO/TS 16949, ISO 9001 and ISO 14001 Certified Company
SOT-23 Formed SMD Package
BF840
BF841
SILICON PLANAR TRANSISTORS
N–P–N transistors
Marking
BF840 = NC
BF841 = ND
PACKAGE OUTLINE DETAILS
ALL DIMENSIONS IN m
m
Pin configuration
1 = BASE
2 = EMITTER
3 = COLLECTOR
3
1
2
ABSOLUTE MAXIMUM RATINGS
BF840
Collector–base voltage (open emitter)
Collector–emitter voltage (open base)
Collector current (d.c.)
Base current
I
C
= 1 mA; V
CE
= 10V
Total power dissipation up to T
amb
= 25 °C
Junction temperature
Feedback capacitance at f = 1 MHz
I
C
= 1 mA; V
CE
= 10V
V
CB0
V
CE0
I
C
I
B
P
tot
T
j
Cre
max.
max.
max.
4,5–15
max.
max.
typ.
250
150
0,3
40
40
25
BF841
V
V
mA
8–28
mA
mW
°C
pF
Continental Device India Limited
Data Sheet
Page 1 of 3
BF840
BF841
RATINGS
(at T
A
= 25°C unless otherwise specified)
Limiting values
Collector–base voltage (open emitter)
Collector–emitter voltage (open base)
Emitter–base voltage (open collector)
Collector current (d.c.)
Total power dissipation up to T
amb
= 25 °C*
Storage temperature
Junction temperature
THERMAL RESISTANCE
From junction to ambient
CHARACTERISTICS
T
j
= 25 °C unless otherwise specified
Collector cut–off current
I
E
= 0; V
CB
= 20 V
Base–emitter voltage
I
C
= 1 mA; V
CE
= 10 V
V
CB0
V
CE0
V
EB0
I
C
P
tot
T
stg
T
j
max.
max.
max.
max.
max.
40
40
4
25
250
V
V
V
mA
mW
–55 to +150 °C
max. 150 ° C
R
th j–a
500
K/W
I
CBO
V
BE
max.
100 nA
typ.
700 mV
650 to 740 mV
BF840
BF841
8–28
380
0,3
mA
MHz
Base current
I
C:
1 mA; V
CE
= 10 V
Transition frequency at f = 100 MHz
I
C
= 1 mA; V
CE
= 10 V
Feedback capacitance at f = 1 MHz
I
C
= 1 mA; V
CE
= 10 V
Noise figure
I
C
= 1 mA; V
CE
= 10 V;
f = 0,2 MHz; R
S
= 200
W
I
B
f
T
C
re
typ.
typ.
4,5–15
380
0,3
pF
F
typ.
1,5
2,0
dB
Continental Device India Limited
Data Sheet
Page 2 of 3
Notes
Disclaimer
The product information and the selection guides facilitate selection of the CDIL's Discrete Semiconductor Device(s) best suited
for application in your product(s) as per your requirement. It is recommended that you completely review our Data Sheet(s) so as
to confirm that the Device(s) meet functionality parameters for your application. The information furnished on the CDIL Web Site/
CD is believed to be accurate and reliable. CDIL however, does not assume responsibility for inaccuracies or incomplete
information. Furthermore, CDIL does not assume liability whatsoever, arising out of the application or use of any CDIL product;
neither does it convey any license under its patent rights nor rights of others. These products are not designed for use in life
saving/support appliances or systems. CDIL customers selling these products (either as individual Discrete Semiconductor
Devices or incorporated in their end products), in any life saving/support appliances or systems or applications do so at their own
risk and CDIL will not be responsible for any damages resulting from such sale(s).
CDIL strives for continuous improvement and reserves the right to change the specifications of its products without prior notice.
CDIL is a registered Trademark of
Continental Device India Limited
C-120 Naraina Industrial Area, New Delhi 110 028, India.
Telephone + 91-11-579 6150 Fax + 91-11-579 9569, 579 5290
e-mail sales@cdil.com
www.cdil.com
Continental Device India Limited
Data Sheet
Page 3 of 3
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